Add permission for AppCompatibilityTest.

Bug: 20134812
Change-Id: Iaf9a9963a16af1e2bb157159648db70666a33c48
diff --git a/tests/Compatibility/AndroidManifest.xml b/tests/Compatibility/AndroidManifest.xml
index 2884532..8ae5bc5 100644
--- a/tests/Compatibility/AndroidManifest.xml
+++ b/tests/Compatibility/AndroidManifest.xml
@@ -19,7 +19,7 @@
     <application >
         <uses-library android:name="android.test.runner" />
     </application>
-
+    <uses-permission android:name="android.permission.REAL_GET_TASKS" />
     <instrumentation
         android:name=".AppCompatibilityRunner"
         android:targetPackage="com.android.compatibilitytest"