More video related API fixes

android.telecom.Connection.VideoProvider
* onSetPauseImage takes Uri instead of String
* changeCallDataUsage -> setCallDataUsage
* add quality constants to changeVideoQuality() docs

android.telecom.InCallService.VideoCall
* setPauseImage takes Uri instea dof String

android.telecom.VideoProfile.VideoState
* Move constants to VideoProfile, prefix with STATE_

Bug: 21040387
Bug: 21066505
Change-Id: I764e72aced9d1e2d30d6d0cf0862100860d47c79

telecomm/java/android/telecom/InCallService.java

@@ -20,6 +20,7 @@ import android.annotation.SdkConstant;
 import android.annotation.SystemApi;
 import android.app.Service;
 import android.content.Intent;
+import android.net.Uri;
 import android.os.Handler;
 import android.os.IBinder;
 import android.os.Looper;
@@ -466,7 +467,7 @@ public abstract class InCallService extends Service {
          *
          * @param uri URI of image to display.
          */
-        public abstract void setPauseImage(String uri);
+        public abstract void setPauseImage(Uri uri);
 
         /**
          * Callback class which invokes callbacks after video call actions occur.