Override aspect ratio to fullscreen when unset for universal resizeable

Bug: 374968702
Test: UserAspectRatioDetailsTest
Test: UserAspectRatioManagerTest
Test: manual, verify which option is selected by default after app
installation
Flag: com.android.window.flags.universal_resizable_by_default

Change-Id: I04063e4a130d42a4bfd7e548940ca5e654a6d012