InputDispatcher_test: Consolidate calls for consuming keys and motions

Consolidate all of the various consume*() calls in InputWindowHandle to
go through a single consume call that matches events using GTest
matchers.

Bug: 210460522
Test: atest inputflinger_tests
Change-Id: Icaf0efbf6d5d9e4b6ad808b8626817e927f772a9