[3/n] Define OVERRIDE_MIN_ASPECT_RATIO_ONLY_FOR_CAMERA

Introduces the OVERRIDE_MIN_ASPECT_RATIO_ONLY_FOR_CAMERA
per app override to intentionally letterbox activities
while camera connection is open, to a more traditional
phone form factors (16:9 or split-screen) aspect ratio
depending on existing OVERRIDE_MIN_ASPECT_RATIO_*
overrides.

The existing PROPERTY_COMPAT_ALLOW_MIN_ASPECT_RATIO_OVERRIDE
can be used to allow to opt-out from this override.

Fix: 325586858
Test: atest WmTests:LetterboxUiControllerTest
Test: atest WmTests:ActivityRecordTests
Test: atest WmTests:DisplayRotationCompatPolicyTests
Test: atest WmTests:SizeCompatTests

Change-Id: Ib0f9a854372e35621345fbad60578c4238f54349
Merged-In: Ib0f9a854372e35621345fbad60578c4238f54349