Fix deadlock between WMG and WMS

The dealock happened while WM#addView and WMS holds lock and called
onWindowTokenRemoved.

WM#addView -> WMG#addView(holds WMG lock) ->
... -> WMS#addWindow(holds WMS lock)
(holds WMS lock) ... -> WindowTokenClient#onWindowTokenRemoved
... -> WMG#closeAll(holds WMG lock)

This CL calls to WMG#closeAll asynchronously to release WMG lock

fixes: 181839758
Test: manual
Change-Id: I0cf8a505043a4def4dcf346952873b1362a92084