Remove DozeFactory. Add DozeComponent/DozeScope.

This replaces DozeFactory with some Dagger idioms. The DozeComponent
is a subcomponent, created by DozeService, for all your Doze related
needs. Items that should only live within the DozeService can be
annotated with @DozeScope.

Fixes: 159701507
Test: atest SystemUITests && manual
Change-Id: I76d0709b1689408d95b4913d0d46761174cf5ea9