Add traces for otp redaction for notifications

Add traces around projection start/stop that trigger nofitication
redactions

Test: atest SystemUITests
Bug: 312784780
Flag: ACONFIG com.android.systemui.screenshare_notification_hiding DISABLED
Change-Id: I8c7b4685eb1aecbe44e6b0850d33ae4a63c9940c
2 files changed