NotificationService causes watchdog issues and improves performance

NotificationComparator will visit settings.db every time it compares ,
and indirectly calling IntArrayMemory is very time consuming, so the solution is optimized

Test: manual - atest NotificationManagerServiceTest and check the logs...

Bug:145560121

Change-Id: Ic66c87d65790b408846cb7ed7ab131c58482fe16
Signed-off-by: shaozhongqi <shaozhongqi@xiaomi.com>