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
[2/2] Statusbar: Make double tap gesture configurable

Change-Id: I921bffdc0878e746dfeb8357afb73e01539d8ff2

Conflicts:
	res/values/slim_strings.xml
[2/2] Statusbar: Make double tap gesture configurable

Change-Id: I921bffdc0878e746dfeb8357afb73e01539d8ff2

Conflicts:
	res/values/slim_strings.xml