Remove unnecessary updateSurfaceScreenOn call.

review.cyanogenmod.org/#/c/34757/1/media/java/android/media/MediaPlayer.java

This change stops updateSurfaceScreenOn() from being called one time
right after another. It's called at the end of stayAwake(boolean awake),
which is called right before updateSurfaceScreenOn() in release().

Change-Id: I9647bbca30834f918f3d62f88377ddff7406bdf0
Signed-off-by: DHO <DHO@dho.im>