hwc: Fix tearing on HDMI. Call glFinish()

When rotator is rotating GPU writes into it causing tearing.  With hwc1.1,
framework doesnt use fbDev, which had a call to glFinish().  Consequently, this
was missed out. Adding this missing code to hwc1.1

Related-to-Bug: 7227220
Change-Id: I7287d3d73b839fef818e31c1c8a783f1fb96d9f1
Signed-off-by: Iliyan Malchev <malchev@google.com>
1 file changed