Add two unit tests for Android AppRTCDemo.

First unit test will create peer connection client, run
for a few second, close it and verify that there were
no any errors and local video was rendered.

Second unit test will run peer connection in a loopback mode.

To run the test from command line install AppRTCDemoTest.apk
and execute the command:
adb shell am instrument -w org.appspot.apprtc.test/android.test.InstrumentationTestRunner

R=jiayl@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/33609004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7991 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/talk/examples/android/README b/talk/examples/android/README
index 5fefb94..ee47e1f 100644
--- a/talk/examples/android/README
+++ b/talk/examples/android/README
@@ -14,7 +14,7 @@
 
 Example of building & using the app:
 
-cd <path/to/libjingle>/src
+cd <path/to/webrtc>/src
 ninja -C out/Debug AppRTCDemo
 adb install -r out/Debug/AppRTCDemo-debug.apk