[Notif] Cache bool instead of manager/info

Follow up to ag/3815403

Updated to cache bool instead of manager/info in order to reduce IPC
calls made thru packagemanager.

Also collapsed test setup for shade.

Change-Id: I8fa116b3f24eaa887d2139c0aab1996e3c95fbdc
Fixes: 74115090
Test: Visually & atest for ExpandableNR