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
7f78f206b7