Move heads up to its own preferencescreen

Change-Id: I7bd9218a58ce79ec7590ca0968aa264b397f2df5
Settings: Heads Up background color && transparency [1/2]

Change-Id: I606bf35d5db9a253448971bdedf6fdb3acad6452
Lockscreen Notifications [2/2]

My try on making notifications easily accessable from lockscreen.
Credits to ChameleonOS, I got the notification listener permission and some small other stuff from their ActiveDisplay implementation.

Lockscreen Notifications allow you to manage all your notifications directly on the lockscreen.

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: Hide notifications content on secure lockscreen.
- Blacklist apps - thanks to ChameleonOS for the original implementation and @Der-Schubi for bringing it to lockscreen notifications
- Show all/dismiss all button, does not dismiss on going notifications, they must be swiped away

Conflicts:
	res/values/slim_arrays.xml
	res/values/slim_strings.xml

Change-Id: Iea8d2c70feba1fbd44f04fbf2b1d6aa748620be4
Remove system updates from about screen

Change-Id: I2979417690c1cdcdd50e2aab768a17ec133524b3
[2/2] Statusbar: Make double tap gesture configurable

Change-Id: I921bffdc0878e746dfeb8357afb73e01539d8ff2

Conflicts:
	res/values/slim_strings.xml
Heads up: option to disable in lockscreen (2/2)

Change-Id: I88c2a284b2b0398833d797ebf859dbdbcf1d7cac
Lockscreen: See through (2/2)

Change-Id: I41c23979a3d7f2d078073dd8134be5dc29d6eecb
Lockscreen: See through (2/2)

Change-Id: I41c23979a3d7f2d078073dd8134be5dc29d6eecb
Remove wallpaper option from display

Launcher should handle this

Change-Id: I5b535c460eedc264105fdbcfcbec7f76d34d3bfb
Cleanup sound settings

Change-Id: I71070521f6368203e327074c0daa7ad2e7d46505
Settings: 6-bar signal icon style [2/2]

Change-Id: Iabe4d497b6283fb76ab5e2b7ce005075139edecf