Notify draw for relaunch with preserved window

In case any logic depends on ActivityRecord#startRelaunching
~ WindowState#finishDrawing can receive paired invocation.

Bug: 264634241
Bug: 263066320
Test: An activity calls recreate().
      There will be a log "finishDrawing of relaunch: Window".
Change-Id: I9406ab5cbca5b3c9c407a136bf4fcb97111d78b8
(cherry picked from commit 5b49c7fb)