Limit access to package names in brightness slider data.

Only allow access to package names if the calling package
has PACKAGE_USAGE_STATS.

Bug: 69405990
Test: runtest -c com.android.server.display.BrightnessTrackerTest frameworks-services
Change-Id: I1c924d408a7c74620b9aa9d672c99a6424bb85ca
7 files changed