Reland "Override desktop tasks corner radius during recents tr..."

Set the corner radius of desktop task surfaces to 0 during recents
transitions so that corner radius doesn't interfere with the surface
bounds and corner radius applied to the RemoteAnimationTarget leashes.

The issue in b/388979758 (causing the original CL to be reverted) was fixed by changes to OtherActivityInputConsumer - in the original CL the callback `FinishImmediatelyHandler#onRecentsAnimationStart()` in that class was never called because it wasn't annotated `@Override` and its base method had a default implementation.

Bug: 378657004
Change-Id: I40444e7e9367a6833171a2e413b51d0d3f974318
Test: manual
Flag: com.android.window.flags.enable_desktop_recents_transitions_corners_bugfix