It will help reduce memory footprint of Launcher, when in background.
It is required to help deallocate images, when Google Now Launcher
goes into the background. See cl/83222937/ .
Plan after this CL:
- Generate drop CL with launcher3_drop.sh. Add empty metods to
make code compile.
- Sync the cl/83222937 and hide the code behind the feature flag.
It was previously submitted in ag/628070 and reverted in ag/630423
due to GSA release schedule.
Change-Id: I56eee618b86d518d0afc362b6cf44c3bbec1f19c
Robert Kozikowski
67c3086163