Reorganize native dep download and extraction (#154)

Summary:
This moves the native setup to a separate gradle file and unpacks everything outside the build folder. That way we don't throw everything away on every incremental build.

This is an intermediate step to get to a more declarative setup like Fresco has it and get rid of the individual hacks we have for every download.
Pull Request resolved: https://github.com/facebook/Sonar/pull/154

Reviewed By: jknoxville

Differential Revision: D8833812

Pulled By: passy

fbshipit-source-id: 2424c9d6e22e6092c04af344e06939b4a6aba041

android/third-party/overrides/DoubleConversion/ApplicationManifest.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.doubleconversion">
+</manifest>

android/third-party/overrides/DoubleConversion/CMakeLists.txt

@@ -0,0 +1,11 @@
+cmake_minimum_required (VERSION 3.6.0)
+
+PROJECT(doubleconversion CXX)
+enable_language(CXX)
+set(PACKAGE_NAME      doubleconversion)
+set(doubleconversion_DIR  double-conversion-3.0.0/double-conversion)
+include_directories(${doubleconversion_DIR})
+file(GLOB SRCFILES  ${doubleconversion_DIR}/*.cc)
+add_library(${PACKAGE_NAME} SHARED ${SRCFILES})
+install(TARGETS ${PACKAGE_NAME}  DESTINATION ./build/)
+target_link_libraries(${PACKAGE_NAME})

android/third-party/overrides/DoubleConversion/build.gradle

@@ -0,0 +1,30 @@
+apply plugin: 'com.android.library'
+
+android {
+    compileSdkVersion rootProject.compileSdkVersion
+    buildToolsVersion rootProject.buildToolsVersion
+
+    defaultConfig {
+        minSdkVersion rootProject.minSdkVersion
+        targetSdkVersion rootProject.targetSdkVersion
+        buildConfigField "boolean", "IS_INTERNAL_BUILD", 'true'
+        externalNativeBuild {
+            cmake {
+                arguments '-DANDROID_TOOLCHAIN=clang'
+            }
+        }
+    }
+    lintOptions {
+        abortOnError false
+    }
+    sourceSets {
+        main {
+            manifest.srcFile './ApplicationManifest.xml'
+        }
+    }
+    externalNativeBuild {
+        cmake {
+            path './CMakeLists.txt'
+        }
+    }
+}