Log touches to ActivatableNotificationViews

Bug: 330492016
Test: manual: `adb shell cmd statusbar echo -t systemui.shade.touch:v`, `adb logcat -s systemui.shade.touch`; touch some things in the shade
Flag: NA
Change-Id: I557a0073c5233ae5f542369f2935b5cef602ce98
1 file changed