Remove aspect ratio limit for unresizable apps.

We recently merged I750b8fd464b041f16bf18c3bdbfb1a28a2132902 to ensure CDD requirement 7.1.1.2 that was removed shortly after changes were landed. This change:
- Removes default aspect ratio limitation from the framework
- Allows to set different aspect ratio limitations for apps that eligible or not for a size compat mode.
- Fixes a bug in split screen aspect ratio logic that wrongly applied split divider insets twice.

Fix: 236165529
Test: atest WmTests:SizeCompatTests
Change-Id: I9251e7f34f108f5bed420e5b1949d081f25a0d72