hwc: reuse gscaler device between frames

The Gscaler device is cleaned up (along with the destination buffers) on
the first frame where it is not needed anymore.

Bug: 7202379
Change-Id: Icb9239a603b46ffb70ce2bba5dd8d998541cf0f5
Signed-off-by: Greg Hackmann <ghackmann@google.com>
1 file changed