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.

PS3 - Added material green icons for SU

Change-Id: I2af95a1a4396101ff87448cd0ae20addf235af52
Added build date (ro.build.date from build.prop) to device info.

Change-Id: I5e19ee04de5c26822e171d4af8f4bfc052be9b74

Conflicts:
	res/values/cm_strings.xml
Name that to frank version
strings.xml change
Merge branch 'frankie-r6' of https://github.com/The-Ancile-Project/platform_packages_apps_settings into dok-r7