Add angle library apk

AndroidManifest.xml

+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright 2018 The Chromium Authors. All rights reserved.  Use of this
+  source code is governed by a BSD-style license that can be found in the
+  LICENSE file.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    package="com.google.android.angle">
+    <uses-sdk android:minSdkVersion="24"
+              android:targetSdkVersion="24">
+    </uses-sdk>
+
+    <!-- TODO: Remove debuggable property for production? -->
+    <application android:label="Android System Angle"
+        android:extractNativeLibs="false"
+        android:multiArch="true"
+        android:debuggable="true"
+        android:hasCode="false">
+    </application>
+</manifest>

BUILD.gn

@@ -8,6 +8,10 @@ import("//build/config/linux/pkg_config.gni")
 import("//build/config/ui.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 import("gni/angle.gni")
+if (is_android) {
+  # android/rules.gni can only be imported for Android targets
+  import("//build/config/android/rules.gni")
+}
 
 declare_args() {
   # Use the PCI lib to collect GPU information on Linux.
@@ -906,3 +910,24 @@ executable("angle_shader_translator") {
     "//build/config:exe_and_shlib_deps",
   ]
 }
+
+if (is_android) {
+  # Package ANGLE libraries for pre-installed system image
+  android_apk("angle_apk") {
+    if (build_apk_secondary_abi && android_64bit_target_cpu) {
+      secondary_abi_shared_libraries = [
+          "//third_party/angle:libGLESv2${angle_libs_suffix}($android_secondary_abi_toolchain)" ,
+          "//third_party/angle:libEGL${angle_libs_suffix}($android_secondary_abi_toolchain)"
+      ]
+    }
+
+    android_manifest = "AndroidManifest.xml"
+    requires_sdk_api_level_23 = true
+    apk_name = "AngleLibraries"
+    uncompress_shared_libraries = true
+    shared_libraries = [
+      "//third_party/angle:libGLESv2${angle_libs_suffix}",
+      "//third_party/angle:libEGL${angle_libs_suffix}"
+    ]
+  }
+}