Extract QSSecurityFooterUtils out of QSSecurityFooter

This CL extracts QSSecurityFooterUtils out of QSSecurityFooter to make
it usable outside of QSSecurityFooter, which is a ViewController scoped
to the Quick Settings fragment. This will make the utils usable outside
this controller, e.g. in an Interactor/ViewModel not scope to QS.

Bug: 242040009
Test: atest QSSecurityFooterTest
Change-Id: If8289c9f28525f35603d03ed0ba3e646b7c06df8
3 files changed