Suppress bubble notifs instead of cancel

Bubble notifs in the Launcher icon popup can't be swiped away
because NotificationManagerService skips bubble notifs during
cancellation.

This change suppresses the notif instead of skipping it, which
results in a post event.

ag/11727210 set canShowBadge=false for suppressed notifs.
Launcher removes notifs with canShowBadge=false, so it will remove the
suppressed notif upon receiving the post event.

Fixes: 131926652
Test: atest NotificationManagerServiceTest
Test: manual
	1) Have notif in shade with bubble
	2) Swipe notif away in launcher popup
	3) Shade notif goes away

Change-Id: I6609d1209be6686c9286f939bf420d4f09351af4