Prepare to make time detection more configurable

Prepare to make time detection more configurable. This change introduces
an idea of origin ordering ("priority") so that different partners and
form factors can modify the previously hardcoded ordering of "telephony
(NITZ) first then network (NTP)".

This commit also modifies the name of the method used to trigger a time
detection cycle after a config change. It's possible partners may want
to make the priority originate from a setting rather than static config
(i.e. so the partner can pick between origins or origin orders). This
would involve more work than currently planned, but it is easy to make
the method name less specific.

Bug: 172230856
Test: treehugger
Test: atest TimeDetectorStrategyImplTest
Change-Id: Id1652be174b7503618e0b802dc7da4d00df4f248