Limit the number of concurrently snoozed notifications Test: atest FrameworksUiServicesTests Bug: 234441463 Change-Id: I005b43979d1c708fd505c8b33ae0c8cb03ddbb35 Merged-In: I005b43979d1c708fd505c8b33ae0c8cb03ddbb35 (cherry picked from commit 7c38394ae9c69620499a87e629edae4fe0ac4edc) (cherry picked from commit bc808de2f8a88e76fde0b6d033b4a232aebff8cb) Merged-In: I005b43979d1c708fd505c8b33ae0c8cb03ddbb35