Make CompatConfig be package private.

All access will go through PlatformCompat Service.
This is a step towards having callbacks upon a config change, which is
needed for seLinux support.

Test: test app + adb command locally
Bug: 143539591
Bug: 143758748
Change-Id: I31d1c40e99894e77e85a8c33eb07ed9052c8e43a
5 files changed