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