DesktopModeWindowDecor: update App Handle holder after recents anim.

After Recents animation finish it is possible we need to restore app
handle functionality, but we should avoid doing a relayout just for the
sake of this. Instead do a light weight relayout - simply update the app
handle view holder.

Bug: 410838192
Test: atest, Manual (Overview in/out, and quick switch, app handle
works)
Flag:com.android.window.flags.enable_input_layer_transition_fix

Change-Id: I8923ddfe0f7d97c376eed207bf81dd946d77eb09