Add debug logs with LogBuffer for touch/tap events

Bug: 247694441
Test: adb shell settings put global systemui/buffer/ShadeLog DEBUG echoes the logs to logcat
Test: adb shell settings put global systemui/buffer/NotifHeadsUpLog DEBUG echoes the logs to logcat
Test: adb logcat -s "NotificationStackScroll:*" "systemui.shade:*" shows
these added logs

Change-Id: I85c6402da9417e637cdb61ae05de9b7cfa7297de