API Cleanup: Remove VideoState class.

- Remove VideoState class.
- Replace references to VideoState constants with VideoProfile equivalent.
- Push VideoState static methods into VideoProfile.

Bug: 21573551
Change-Id: I1bca02772b5b7d86643f612824b07faef7618725

telecomm/java/android/telecom/RemoteConnection.java

@@ -605,7 +605,7 @@ public final class RemoteConnection {
     /**
      * Obtains the video state of this {@code RemoteConnection}.
      *
-     * @return The video state of the {@code RemoteConnection}. See {@link VideoProfile.VideoState}.
+     * @return The video state of the {@code RemoteConnection}. See {@link VideoProfile}.
      */
     public int getVideoState() {
         return mVideoState;