Revert "Making ScreenOnUnblocked and ScreenOffUnblocked public"

This reverts commit ab65a5078130b2d107e8447848c3c57e0e642594.

Reason for revert: Revert for testing breakage b/264228834

Change-Id: I23533cf44fe4afbb2c152e35279443a9858886e9
3 files changed