- Add MDNS aidl that NsdService can communicate with mdns service via binder call instead of using ndc. - Add mdns_aidl_interface to separate the mdns aidl from netd_aidl_interface. Bug: 209894875 Test: atest FrameworksNetTests CtsNetTestCases Change-Id: I7bcbd6146269bdd9ac973d651a676bd9d126ae2d