Add test for isolated services.

Change-Id: Ibcbc4e766400acb8cf0385f922db6ca448a652a3
diff --git a/tests/ActivityTests/AndroidManifest.xml b/tests/ActivityTests/AndroidManifest.xml
index 513f622..33d40ad 100644
--- a/tests/ActivityTests/AndroidManifest.xml
+++ b/tests/ActivityTests/AndroidManifest.xml
@@ -57,6 +57,8 @@
         </service>
         <receiver android:name="UserTarget">
         </receiver>
+        <service android:name="IsolatedService" android:isolatedProcess="true">
+        </service>
         <receiver android:name="StartEmpty" android:exported="true">
             <intent-filter>
                 <action android:name="com.example.START_EMPTY" />