Add new overridable annotation to platform compat

With this CL the annotation is only digested, but has no behaviour
change yet. Eventually this annotation allows the annotated change id to
be overriden on non-debug builds

Bug: 174043039
Test: atest FrameworksServicesTests:PlatformCompatTest
Change-Id: Ibc1fce37085213b5a02155010189949e193f0882