tree d825fdc1eaae3613cf8a4c6b68220ca3722390b8
parent af18ea141213e650aee1ce8c35227a85779b89d0
author Pullakavi Srinivas <spullaka@codeaurora.org> 1563268746 +0530
committer Ravikanth Tuniki <rtunik@codeaurora.org> 1569419905 +0530

hwc2: Do not flush on empty layer stack.

-- Some applications can take time to queue buffers during switches ie;
   HDR to Non-HDR, Secure to Non-secure etc; Even though layer stack
   is empty it is OK to display previous frame.

-- Composer Client explicitly clears layers upon SurfaceFlinger death.
   Since client isn't active, chances of getting a new frame is very unlikey.
   Trigger flush so that content gets cleared.

Change-Id: If91135b3d5ea6d0f8842c7ef75547a68002c70ff
CRs-Fixed: 2489780