Revet "Settings: LockScreen Notifications"

Change-Id: I144ff5026009c449fd14f74c57e44089608a8ce0
Reimplement "[2/2] Lockscreen Notifications"

Change-Id: I976a80ac87cfa798822e5b84381748beee7ffb09
[2/2] Losckscreen Notifications fixes

- Lockscreen Notifications: fix removal of pocketmode setting
from: https://github.com/AOSPAL/android_packages_apps_Settings/commit/b2ff326f86c6641486dc92de9e02c36a727f5040

Change-Id: Ic371e2b409de9c77c7b33aa1eead14cd0a0df563