[9/n] Use AppCompatOrientationPolicy and create tests

ActivtiyRecord now interacts directly with the
AppCompatOrientationPolicy. Related tests moved from
LetterboxUiControllerTest to AppCompatOrientationPolicyTest

Flag: EXEMPT refactor
Bug: 346264992
Test: atest WmTests:AppCompatOrientationPolicyTest
Test: atest WmTests:AppCompatOrientationCapabilityTest
Test: atest WmTests:LetterboxUiControllerTest
Test: atest WmTests:SizeCompatTests
Test: atest WmTests:TransparentPolicyTest

Change-Id: I90d5aa42dfced27f46d15f3a4f73cdfdefe8d21e