[ShellTransition]: invoke WMS#setRecentsAppBehindSystemBars to WM

With enabling shell-transition, in case of seeing status bar icon
blinking when hammer tapping on the navigation bar to trigger recents
animation quickly as CL[1] mentioned,

As the result, Launcher side still need to callback recents app
behind system bar status to signal WM if launcher should affect
system bar appearance with [1] introduced method
setRecentsAppBehindSystemBars.

Bug: 215504556
Test: manual as below steps
  1) Launching a app
  2) Hammer tapping on the navigation bar
  3) Expect the staus bar icon won't blinking

Change-Id: I4b41e06e559168a61a29fa6ea9f58b834a7f1a1c