Apply consistent order to SBNActivityStarter

It has a lot of fields and constructor parameters, as does its builder.
None of them match each other's order. Rearranged everything so they're
all in the same order (and somewhat make sense within ordering).

Bug: 112656837
Test: manual
Change-Id: I37b36e1b7bfc83c7f7328267f4e70d6b6ca5db4c