Only report compat changes when target sdk match or report requested

Don't log from PlatformCompat if change isn't targeting the latest target SDK unless reporting specifically requested - ie skip logging  older changes when isChangeEnabled is being used.

Bug: 430863454
Flag: EXEMPT doesn't impact user-visible device behavior
Change-Id: I8a987ff78199034e114dbdb49e216ee1c7a562b6
Test: atest PlatformCompatFrameworkTests PlatformCompatTest