Replace hidden NMS default network configuration API

Replace the hidden setDefaultNetId and clearDefaultNetId NMS
APIs with accessing INetd directly for the incoming
ConnectivityService mainline.

Bug: 170598012
Test: atest FrameworksNetTests
Test: manually connect and disconnect wifi
Change-Id: I162fae5ca444207a037e5ac4bf8fa0a77a648ca1
4 files changed