Allow certain KeyEvents to bypass falsing

When a keyboard is attached to a device, sometimes keys were being
ignored due to falsing. We should allow certain keys to bypass falsing.

Fixes: 319230892
Test: atest FalsingCollectorImplTest
Test: atest FalsingDataProviderTest
Test: atest TimeLimitedInputEventBufferTest
Test: atest NotificationShadeWindowViewControllerTest
Flag: NONE
Change-Id: I637621de4b94067a94c077d0284216e64c1d6b5a