Pass TransitionInfo from onTasksAppeared() to TransformParams

Pass the TransitionInfo of the merging recents-transition through to
TransformParams to allow setting the corner radius of desktop tasks to
zero during the second part of a recents transition.

Bug: 378657004
Flag: com.android.window.flags.enable_desktop_recents_transitions_corners_bugfix
Test: swipe up from fullscreen app to overview, then tap desktop tile

Change-Id: I08f87aa1b9a2feca9e9f8bed2c55279e0ddc1edb