Settings: Profiles: Update look to be more inline with others

This changes the tab host to a PagerTabStrip to match what is used
in the "Apps" settings screen.

Also simplify menu handling between screens.

Change-Id: If7fa157a6c9e346c1dba8ed7282c35e9cb4e11fd
Add a confirmation dialog before SELinux enforcing

Change-Id: I20b6ca9a729f58c3b5637ed29b7be7b8dbf9c3d4