Add versioning to app compat framework

With this change, callers can set overrides for specific versions of an
app. The framework falls back to default version when the given version
doesn't have an override set.

Bug: 174043039
Test: atest FrameworksServicesTests:CompatConfigTest
Test: atest FrameworksServicesTests:PlatformCompatTest
Test: atest PlatformCompatGating
Change-Id: Ib5ff67e752a9c5ee94b6e1dd664d324ab5bf4542