[11/n] Rename AppCompat Capability suffix to Overrides

Rename *Capability classes to *Overrides for a better
description of theit purpose.

Flag: EXEMPT refactor
Bug: 345156325
Test: atest WmTests:AppCompatOrientationPolicyTest
Test: atest WmTests:AppCompatOrientationOverridesTest
Test: atest WmTests:LetterboxUiControllerTest
Test: atest WmTests:SizeCompatTests
Test: atest WmTests:TransparentPolicyTest

Change-Id: I31c7e1c12b756cab6c4095aa9e84e57a638bb9f3