Add a quick SELinux mode toggle

There's no way to make it persistent, by design. This is purposefully
undocumented and meant to test policies at this stage.

Change-Id: Ic79ed773b199b68fee15f94acd2107a5ad20dc25
Add preference for enabling root access (3/3)
* Root over ADB is now disabled by default on non-eng builds
* Requires support in su binary and adbd
* Root access can be configured to use ADB only, apps only, or all

Change-Id: I132a35a31c676511db954ff19120fa6d3c795b23

cyanogen authored 2 years ago