Send P2P DISCONNECTED broadcast when user rejects negotiation

P2P returns to inactive state when the user rejects a negotiation
request, so we should also send a broadcast to clients with the updated
state.

Bug: 286153771
Test: atest WifiP2pServiceImplTest
Change-Id: I311ac8e5f5a140edc6f0801b530208adcf3a2441
2 files changed