Update remote floating toolbar content rect on layout change

Animation end is not the correct singal and may be dispatched before the
size and location are set.

Test: Turn off animations then manual.
      LoginActivityTest#testAutofillManuallyOneDataset
Bug: 408556479
Bug: 363318732
Flag: android.permission.flags.system_selection_toolbar_enabled
Change-Id: I98d63bda9df346b0e42c427a5f36baa3d5f3d516