Integrate system language filtering functionality

Filter system languages based on the configuration provided via
the corresponding system property.

Bug: 154133013
Test: manual; atest LocalizationTest
Change-Id: I7e4694f4b381ab81d0e8ceab97bad68bb266aaee
diff --git a/tests/LocalizationTest/AndroidManifest.xml b/tests/LocalizationTest/AndroidManifest.xml
new file mode 100644
index 0000000..b135443
--- /dev/null
+++ b/tests/LocalizationTest/AndroidManifest.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2020 The Android Open Source Project
+  ~
+  ~ 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.
+  -->
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.android.android.internal.app">
+
+    <application android:debuggable="true"  android:testOnly="true">
+        <uses-library android:name="android.test.runner" />
+    </application>
+
+    <instrumentation
+        android:name="androidx.test.runner.AndroidJUnitRunner"
+        android:targetPackage="com.android.android.internal.app"
+        android:label="Localization Tests" />
+
+</manifest>