The go home action for action corner should be irreversible for now.
When home action corner is triggered at homepage, it should just stay at homepage and would not go back to previous task.
Add flag for the reversible behavior for non-desktop mode home action corner. It is to be completed with dekstop mode in later release.
Bug: 397182595
Test: ActionCornerHandlerTest
Flag: com.android.launcher3.enable_reversible_home_action_corner
Change-Id: Ib36581d0d3d81d4a7ff8f8d6265d8d5d5f5872fd
helen cheuk
9598e4c78c