1bc034cb87
1. Support multiple callbacks in TestNetworkCallback. This is necessary to test situations where multiple callbacks are generated by the same event (e.g., CALLBACK_LOSING on cell with CALLBACK_AVAILABLE on wifi when wifi connects), which is necessary to test callback order. So far this has not been covered because all callback testing was using per-network callbacks. 2. Add a benchmark test for registering NetworkRequests and for sending onAvailable and onLosing callbacks. Bug: 23113288 Change-Id: Ib69373358ad766ab1bd989e864a5a51ef762c73c