[DO NOT MERGE] Sync flicker from master to sc-v2

Flicker on master diverged form sc-v2, to make it easier to debug
flicker issues on sc-v2, push the current version of flicker into sc-v2

Test: atest FlickerTests WMShellFlickerTests
Bug: 183993924
Change-Id: Icf40d1aa707ffe80e46dcfd2c616355cf48e6719
75 files changed