Adopt new ListenerTransport framework

This makes all LM listeners static, saving memory across LM instances in
an application. In addition, listeners for rarely used APIs such as GNSS
APIs are now initialized on-demand to save memory. Finally, the new
transport framework is adopted for location listeners, which means a new
transport object will be used for every location request, eliminating
several edge case bugs around listener removal.

Test: manual + cts
Change-Id: I1f374248baf695323177f347873fed72841f85d0