Refine CompatChanges check and enable as error.

Because shifting newly written code over to using CompatChanges is
important, this change refines the recently added check and upgrades
it to become a fatal build error.

Bug: 169879376
Test: atest error_prone_android_framework_test
Change-Id: Ic3126518ebaac9995b8f649e44b839de30faa17f