Refactor snippet RPC methods and events.

1. start/stop ProviderSimulator change to setup/teardown
2. Do not auto start FastPairSimulator in onA2DPSinkProfileConnected callback
3. Add onA2DPSinkProfileConnected event

Test: atest -v CtsSeekerDiscoverProviderTest
BUG: 214015364
Change-Id: I40289fb48919b0890c230b991bc4a0a34a5669d1
7 files changed
tree: 19e5b11c9c76a35305a4f65bc63c549c6586694f
  1. nearby/