Fix logging bug in AppPermissionFragment and extend logging.

Fix bug where changes to permission state was not logged.
Add logging of buttons pressed and permission flags after permission state changed.

Test: ./out/host/linux-x86/bin/statsd_testdrive -p com.google.android.permissioncontroller 215

Change-Id: I798a8ae0a66a2b66c79ea956343fbca02a1e3069