Add build rules to enable language-based split apks on Android

build/android/package_resources_action.gypi

Index: build/android/package_resources_action.gypi
diff --git a/build/android/package_resources_action.gypi b/build/android/package_resources_action.gypi
index 36ee32b49a80c46a6089daa574fbf22391cc797f..eb608718951b25b89efec81054ccf6aa17863047 100644
--- a/build/android/package_resources_action.gypi
+++ b/build/android/package_resources_action.gypi
@@ -14,6 +14,7 @@
 #  asset_location - The directory where assets are located (if any).
 #  create_density_splits - Whether to create density-based apk splits. Splits
 #    are supported only for minSdkVersion >= 21.
+#  language_splits - List of languages to create apk splits for.
 #  resource_zips - List of paths to resource zip files.
 #  shared_resources - Make a resource package that can be loaded by a different
 #    application at runtime to access the package's resources.
@@ -69,11 +70,19 @@
         '--create-density-splits',
       ],
       'outputs': [
-        '<(resource_packaged_apk_path)-hdpi',
-        '<(resource_packaged_apk_path)-xhdpi',
-        '<(resource_packaged_apk_path)-xxhdpi',
-        '<(resource_packaged_apk_path)-xxxhdpi',
-        '<(resource_packaged_apk_path)-tvdpi',
+        '<(resource_packaged_apk_path)_hdpi',
+        '<(resource_packaged_apk_path)_xhdpi',
+        '<(resource_packaged_apk_path)_xxhdpi',
+        '<(resource_packaged_apk_path)_xxxhdpi',
+        '<(resource_packaged_apk_path)_tvdpi',
+      ],
+    }],
+    ['language_splits != []', {
+      'action': [
+        '--language-splits=<(language_splits)',
+      ],
+      'outputs': [
+        "<!@(python <(DEPTH)/build/apply_locales.py '<(resource_packaged_apk_path)_ZZLOCALE' <(language_splits))",
       ],
     }],
     ['resource_zips != []', {