Re-add playback tests to Moe migration

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=145583193

playbacktests/src/androidTest/AndroidManifest.xml

+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2016 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"
+    xmlns:tools="http://schemas.android.com/tools"
+    package="com.google.android.exoplayer2.playbacktests">
+
+  <uses-permission android:name="android.permission.INTERNET"/>
+  <uses-permission android:name="android.permission.WAKE_LOCK"/>
+
+  <uses-sdk android:minSdkVersion="9" android:targetSdkVersion="24"/>
+
+  <application android:debuggable="true"
+      android:allowBackup="false"
+      tools:ignore="MissingApplicationIcon,HardcodedDebugMode">
+    <uses-library android:name="android.test.runner"/>
+
+    <activity android:name="com.google.android.exoplayer2.playbacktests.util.HostActivity"
+        android:configChanges="keyboardHidden|orientation|screenSize"
+        android:label="ExoPlayerTest"/>
+
+  </application>
+
+  <instrumentation
+      android:targetPackage="com.google.android.exoplayer2.playbacktests"
+      android:name="android.test.InstrumentationTestRunner"
+      tools:replace="android:targetPackage"/>
+
+</manifest>