Setup fbjni sub-project for maven (#119)

Summary:
Set up our fbjni sub-project to be published to Maven Central.
This removes a bunch of abiFilters that we no longer make use of, too.
Closes https://github.com/facebook/Sonar/pull/119

Reviewed By: priteshrnandgaonkar

Differential Revision: D8694537

Pulled By: passy

fbshipit-source-id: de246fbda99c02856fbc7806b78df2114cb82acb

libs/easywsclient/build.gradle

@@ -7,11 +7,6 @@ android {
     defaultConfig {
         minSdkVersion rootProject.minSdkVersion
         targetSdkVersion rootProject.targetSdkVersion
-
-        ndk {
-            abiFilters 'x86', 'x86_64', 'armeabi-v7a', 'arm64-v8a'
-        }
-
         externalNativeBuild {
             cmake {
                 arguments '-DANDROID_TOOLCHAIN=clang', '-DANDROID_STL=c++_shared'

libs/fbjni/build.gradle

@@ -1,4 +1,5 @@
 apply plugin: 'com.android.library'
+apply plugin: 'maven'
 
 android {
     compileSdkVersion rootProject.compileSdkVersion
@@ -25,3 +26,15 @@ dependencies {
     compileOnly deps.lithoAnnotations
     implementation deps.soloader
 }
+
+apply from: rootProject.file('gradle/release.gradle')
+
+task sourcesJar(type: Jar) {
+    from android.sourceSets.main.java.srcDirs
+    classifier = 'sources'
+}
+artifacts.add('archives', sourcesJar)
+
+tasks.withType(Javadoc).all {
+    enabled = false
+}

libs/fbjni/gradle.properties

@@ -0,0 +1,20 @@
+#
+# Copyright 2014-present Facebook, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+POM_NAME=SonarFBJNI
+POM_DESCRIPTION=Sonar-scoped FBJNI distribution
+POM_ARTIFACT_ID=fbjni
+POM_PACKAGING=aar