hwc: Stash hdmi mode resolution in a property

The property can be read by apps like YouTube to choose
lower resolution videos if the hdmi mode is < 1080p.
Saves bandwidth, latency, and time wasted scaling.

Change-Id: Iab46699f4ea2208f1f9475420d57ccf1e16214df
Signed-off-by: Mike J. Chen <mjchen@google.com>
1 file changed