7e1160e866
Bug #4994715 In some cases, on some architectures, the hardware renderer could fail to properly render a window after an orientation change. The fix is to force the GL driver to drop any existing buffer to make sure the next buffer used to draw has the correct geometry. This change also fixes an issue that was preventing partial screen updates from being properly enabled. Change-Id: I874a48590845a8624425130af7db8e20022895dd