Lockscreen Notifications [2/2]

Features:
- Pocket mode turn screen on when phone is pulled out of pocket and turn it off when phone gets back in pocket
- Hide low priority notifications
- Hide non-clearable notifications
- Allow dismissing even non-clearable notifications from lockscreen
- Just turn screen on when there's currently a notification pending
- Toggle between expanded and normal notification view by longpressing
- Wake on new notification
- Configure notification count displayed at once
- Privacy Mode: disable showing notification content.
- Blacklist apps - thanks to ChameleonOS for the original implementation and @Der-Schubi for bringing it to lockscreen notifications
- Show all/dismiss all button

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PS1: Initial upload for PAC
PS2: Fix missing symbols and files
PS3: Fix NPE
PS4: Rebase

Change-Id: If5be324a3b3b0ff057417b4ac60404e9092dcbb7
Signed-off-by: Lokesh Chamane <lokesh.c703@gmail.com>