Propagate desks changes

This CL propagates desk changes events to `RecentTasksList` and
`RecentsView`.

Bug: 395908683
Test: m
Flag: com.android.window.flags.enable_multiple_desktops_frontend
Flag: com.android.window.flags.enable_multiple_desktops_backend
Change-Id: I77457d5e2e66166dd8c7d6505317d9add5b886a2
15 files changed