hwc: Handle validation reset during InternalValidate state

If layer stack needs Client composition, HWC display gets into the
Internal Validate state. If validation gets reset by another thread
in this state, set the geometry change flag on stack to ensure that
Client target gets composed by SF.

CRs-Fixed: 2497345
Change-Id: If82ed6e64cb1037f17cfa1ea4877632562ae6ca2
1 file changed