Set transport control flags when a session is created

Some apps only set the transport control flags once when their service
starts. This was leading to them not getting set when a session is
created on their behalf in RCC. This sets the flags when a session
is created if needed.

bug:16822064
Change-Id: Iea1ebf7747b3059101eb3c36b143b594cc51e114

media/java/android/media/RemoteControlClient.java

@@ -389,6 +389,9 @@ import java.lang.IllegalArgumentException;
     public void registerWithSession(MediaSessionLegacyHelper helper) {
         helper.addRccListener(mRcMediaIntent, mTransportListener);
         mSession = helper.getSession(mRcMediaIntent);
+        if (mTransportControlFlags != 0) {
+            setTransportControlFlags(mTransportControlFlags);
+        }
     }
 
     /**