Refactor VideoCapturerAndroid tests in WebRTC.

webrtc/api/java/android/org/webrtc/CameraVideoCapturer.java

Index: webrtc/api/java/android/org/webrtc/CameraVideoCapturer.java
diff --git a/webrtc/api/java/android/org/webrtc/CameraVideoCapturer.java b/webrtc/api/java/android/org/webrtc/CameraVideoCapturer.java
index 46432d4619f81e9c5932ad6cb26baa2b9bed9e69..ac46331bc26964be6aad551bb60e7e694954751c 100644
--- a/webrtc/api/java/android/org/webrtc/CameraVideoCapturer.java
+++ b/webrtc/api/java/android/org/webrtc/CameraVideoCapturer.java
@@ -56,6 +56,8 @@ public interface CameraVideoCapturer extends VideoCapturer {
    */
   void switchCamera(CameraSwitchHandler switchEventsHandler);
 
+  String getCurrentCameraId();

[perkj_webrtc, 2016/06/14 06:02:35]

Can we remove this from the interface again.  The test can maybe just always
open the front camera ?  Or can we retrieve the name instead? When a camera is
created or enumerated we require  a name that is a String.  So this could be
String getCurrentCameraName ? 

[sakal, 2016/06/14 08:40:55]

Done.

+
   /**
    * Helper class to log framerate and detect if the camera freezes. It will run periodic callbacks
    * on the SurfaceTextureHelper thread passed in the ctor, and should only be operated from that