Create windowless starting surface on opening target.
If config_predictShowStartingSurface has enabled, create a windowless
starting surface, and attach it on the opening animation target. And
remove the starting surface when transition is about to happen.
Need to hide the close target when transition start, because unlike
launchTaskBehind, when using windowless starting surface to the opening
target, the opening target will also be collect in next transition, so
both open and close will be reparent to transition root while apply the
start transaction, which may cause flicker.
Bug: 257857570
Bug: 268563842
Test: manual, trigger a cross-task/activity animation, and verify
snapshot or splash starting surface can draw on the open target.
Test: atest BackGestureInvokedTest BackNavigationControllerTests
Change-Id: I5c703909faa4538f9ff89e4fd5879e84684611df
6 files changed
