Add event log for keyguard occlude status chagne.

Bug: 271433779
Bug: 269892931
Test: adb logcat -b events
Merged-In: Id32e7db9d2147e4a5458dd313edfd453ade74d51
Change-Id: Id32e7db9d2147e4a5458dd313edfd453ade74d51
4 files changed