Reapply previous states when recreating the task bar

- When the taskbar is recreated (ie. from a display config change),
  the previous states sent from SysUI need to be reapplied to the
  new controllers

Fixes: 267664948
Test: Wipe device, in SUW accessibility settings change the display
      density and verify it properly tints the back button
Change-Id: I837a67ced2941d4545359b8231026044b5479767