Backport Launch SuperSU from Settings

If SuperSU is installed, show an entry in Settings below
"Developer options", which launches SuperSU when tapped.
At boot time SuperSU will detect if com.android.settings
contains the resources from this patch, and if so it
will hide itself from the launcher. This was implemented
in v1.85, so we only show the entry if the installed
SuperSU version is at least that.

Change-Id: I1796d92458587b9e961d5d8e6d58099e8367834d
hide System update setting PreferenceScreen
Navigation bar custom height [1/2]

credits to snak3ater
Cleanup
status bar: native battery percentage [1/2]

Credits to Rascarlo

Conflicts:
	res/values/simpleaosp_strings.xml
volume rocker: volume key cursor control

Conflicts:
	res/values/ras_strings.xml
	res/xml/system_settings.xml