Add "not congested" network capability.

Can be used by a network to indicate when it's congested, meaning that
apps should defer network traffic that could be done at a later time.

Test: bit FrameworksNetTests:android.net.,com.android.server.net.,com.android.server.connectivity.VpnTest,com.android.server.ConnectivityServiceTest
Bug: 64133169
Change-Id: I97664d041920c8d6e3f9fb7c9e8638925b15c30e
1 file changed
tree: 19d50c258b3989c6aa9fc2c0de5663caaa562e06
  1. java/
  2. Android.mk