Add a basic android plugin

Summary:
Moves some things around for package access reasons.
Otherwise sets up the simplest possible plugin that
just sends over all the data it shows in the UI
on connection time. Is that a good idea? You tell me.

JS part coming with the next diff.

Reviewed By: jknoxville

Differential Revision: D15182282

fbshipit-source-id: da5c1de43dfaee273b4eecc0f4512bef872a0ac6

android/tutorial/src/main/java/com/facebook/flipper/sample/tutorial/MarineMammal.kt

@@ -5,7 +5,7 @@
  * in the root directory of this source tree.
  */
 
-package com.facebook.flipper.sample.tutorial.ui
+package com.facebook.flipper.sample.tutorial
 
 import android.net.Uri
 

android/tutorial/src/main/java/com/facebook/flipper/sample/tutorial/MarineMammals.kt

@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2018-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the LICENSE
+ * file in the root directory of this source tree.
+ *
+ */
+
+package com.facebook.flipper.sample.tutorial
+
+import androidx.core.net.toUri
+
+object MarineMammals {
+    val list = listOf(
+            MarineMammal(
+                    "Polar Bear",
+                    "https://upload.wikimedia.org/wikipedia/commons/thumb/8/84/Ursus_maritimus_4_1996-08-04.jpg/190px-Ursus_maritimus_4_1996-08-04.jpg".toUri()),
+            MarineMammal(
+                    "Sea Otter",
+                    "https://upload.wikimedia.org/wikipedia/commons/thumb/1/15/Sea_otter_cropped.jpg/220px-Sea_otter_cropped.jpg".toUri()),
+            MarineMammal(
+                    "West Indian Manatee",
+                    "https://upload.wikimedia.org/wikipedia/commons/thumb/6/6f/FL_fig04.jpg/230px-FL_fig04.jpg".toUri()),
+            MarineMammal(
+                    "Bottlenose Dolphin",
+                    "https://upload.wikimedia.org/wikipedia/commons/thumb/1/10/Tursiops_truncatus_01.jpg/220px-Tursiops_truncatus_01.jpg".toUri())
+    )
+}

android/tutorial/src/main/java/com/facebook/flipper/sample/tutorial/TutorialApplication.kt

@@ -15,6 +15,7 @@ import com.facebook.flipper.plugins.fresco.FrescoFlipperPlugin
 import com.facebook.flipper.plugins.inspector.DescriptorMapping
 import com.facebook.flipper.plugins.inspector.InspectorFlipperPlugin
 import com.facebook.flipper.plugins.litho.LithoFlipperDescriptors
+import com.facebook.flipper.sample.tutorial.plugin.SeaMammalFlipperPlugin
 import com.facebook.litho.config.ComponentsConfiguration
 import com.facebook.litho.sections.config.SectionsConfiguration
 import com.facebook.litho.widget.SectionsDebug
@@ -37,6 +38,7 @@ class TutorialApplication : Application() {
 
         flipperClient.addPlugin(InspectorFlipperPlugin(this, descriptorMapping))
         flipperClient.addPlugin(FrescoFlipperPlugin())
+        flipperClient.addPlugin(SeaMammalFlipperPlugin())
         flipperClient.start()
     }
 }

android/tutorial/src/main/java/com/facebook/flipper/sample/tutorial/plugin/SeaMammalFlipperPlugin.kt

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2018-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the LICENSE
+ * file in the root directory of this source tree.
+ *
+ */
+
+package com.facebook.flipper.sample.tutorial.plugin
+
+import com.facebook.flipper.core.FlipperConnection
+import com.facebook.flipper.core.FlipperObject
+import com.facebook.flipper.core.FlipperPlugin
+import com.facebook.flipper.sample.tutorial.MarineMammals
+
+class SeaMammalFlipperPlugin : FlipperPlugin {
+    private var connection: FlipperConnection? = null
+
+    override fun getId(): String = "sea-mammals"
+
+    override fun onConnect(connection: FlipperConnection?) {
+        this.connection = connection
+
+        MarineMammals.list.mapIndexed { index, (title, picture_url) ->
+            FlipperObject.Builder()
+                    .put("id", index)
+                    .put("title", title)
+                    .put("url", picture_url).build()
+        }.forEach(this::newRow)
+    }
+
+    override fun onDisconnect() {
+        connection = null
+    }
+
+    override fun runInBackground(): Boolean = false
+
+    private     fun newRow(row: FlipperObject) {
+        connection?.send("newRow", row)
+    }
+}

android/tutorial/src/main/java/com/facebook/flipper/sample/tutorial/ui/FeedItemCardSpec.kt

@@ -7,6 +7,7 @@
 
 package com.facebook.flipper.sample.tutorial.ui
 
+import com.facebook.flipper.sample.tutorial.MarineMammal
 import com.facebook.litho.Column
 import com.facebook.litho.Component
 import com.facebook.litho.ComponentContext
@@ -24,7 +25,8 @@ object FeedItemCardSpec {
   @OnCreateLayout
   fun onCreateLayout(
       c: ComponentContext,
-      @Prop mammal: MarineMammal): Component =
+      @Prop mammal: MarineMammal
+  ): Component =
       Column.create(c)
           .paddingDip(VERTICAL, 8f)
           .paddingDip(HORIZONTAL, 16f)

android/tutorial/src/main/java/com/facebook/flipper/sample/tutorial/ui/FeedSectionSpec.kt

@@ -7,6 +7,7 @@
 
 package com.facebook.flipper.sample.tutorial.ui
 
+import com.facebook.flipper.sample.tutorial.MarineMammal
 import com.facebook.litho.annotations.FromEvent
 import com.facebook.litho.annotations.OnEvent
 import com.facebook.litho.annotations.Prop
@@ -32,7 +33,8 @@ object FeedSectionSpec {
     @OnEvent(RenderEvent::class)
     fun render(
             c: SectionContext,
-            @FromEvent model: MarineMammal): RenderInfo =
+            @FromEvent model: MarineMammal
+    ): RenderInfo =
             ComponentRenderInfo.create()
                     .component(FeedItemCard.create(c).mammal(model).build())
                     .build()

android/tutorial/src/main/java/com/facebook/flipper/sample/tutorial/ui/MarineMammals.kt

@@ -1,19 +0,0 @@
-/*
- * Copyright (c) Facebook, Inc. and its affiliates.
- *
- * This source code is licensed under the MIT license found in the LICENSE file
- * in the root directory of this source tree.
- */
-
-package com.facebook.flipper.sample.tutorial.ui
-
-import androidx.core.net.toUri
-
-object MarineMammals {
-    val list = listOf(
-            MarineMammal("Polar Bear", "https://upload.wikimedia.org/wikipedia/commons/thumb/8/84/Ursus_maritimus_4_1996-08-04.jpg/190px-Ursus_maritimus_4_1996-08-04.jpg".toUri()),
-            MarineMammal("Sea Otter", "https://upload.wikimedia.org/wikipedia/commons/thumb/1/15/Sea_otter_cropped.jpg/220px-Sea_otter_cropped.jpg".toUri()),
-            MarineMammal("West Indian Manatee", "https://upload.wikimedia.org/wikipedia/commons/thumb/6/6f/FL_fig04.jpg/230px-FL_fig04.jpg".toUri()),
-            MarineMammal("Bottlenose Dolphin", "https://upload.wikimedia.org/wikipedia/commons/thumb/1/10/Tursiops_truncatus_01.jpg/220px-Tursiops_truncatus_01.jpg".toUri())
-    )
-}

android/tutorial/src/main/java/com/facebook/flipper/sample/tutorial/ui/MarineMammelComponentSpec.kt

@@ -8,6 +8,7 @@
 package com.facebook.flipper.sample.tutorial.ui
 
 import android.graphics.Typeface
+import com.facebook.flipper.sample.tutorial.MarineMammal
 import com.facebook.litho.Column
 import com.facebook.litho.Component
 import com.facebook.litho.ComponentContext

android/tutorial/src/main/java/com/facebook/flipper/sample/tutorial/ui/RootComponentSpec.kt

@@ -7,6 +7,7 @@
 
 package com.facebook.flipper.sample.tutorial.ui
 
+import com.facebook.flipper.sample.tutorial.MarineMammals
 import com.facebook.litho.Component
 import com.facebook.litho.ComponentContext
 import com.facebook.litho.annotations.LayoutSpec