Revert "Settings: Volume panel background color && transparency [1/2]"

This reverts commit f3b9118218188d1806b166312e6dd2868b32cc01.
Settings: Volume panel background color && transparency [1/2]

Allow user to specify background color and transparency level
    for volume panel.

PS: make "TRDS default" summary value a resource so
        it can be translated.

Change-Id: Ic788b4ccf1826075a600e53bc6a7c3c8bda50685
Revert "Lockscreen Notifications [2/2]"

This reverts commit ac4d1e3292746dcedafef4170a59a58fb8b5fd5c.
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

Draft

Change-Id: Iea8d2c70feba1fbd44f04fbf2b1d6aa748620be4