Fix crashed reportSystemGestureExclusionChanged

As an IPC call, there is a small chance that the window is removed
before this method is called. Similar to setOnBackInvokedCallback(), log
instead of exception

Fix: 288913430
Test: atest WmTests:WindowManagerServiceTests
Change-Id: I914ae438f1468f6b49d3948baac5fb45df48f3f8