Invalidate snapshot of home if its UI is changed
Snapshot may be enabled for home task when turning off
screen. If home UI has changed after screen off, the
snapshot should not be used to avoid ugly visual effect.
Bug: 140811348
Test: Lock/unlock device while home is on top with 4 cases:
1. All apps is shown.
2. Overview is shown.
3. Options menu is shown.
4. Quick search bar is active.
The expected result should be no starting window
when unlocking because the snapshot is dropped.
Change-Id: I4bd9926b6f9332ac16b1b3a25ffdd44706015a33
(cherry picked from commit 0ae61c8d2979569c5ca74593b8e4e48e825f86e2)
3 files changed