Remove usage of networkAttributes

networkAttributes is a legacy configuration that is now only used to
configure which legacy type networks are supported, and what the restore
timer is for that network type, for the deprecated
startUsingNetworkFeature API.

Use a dedicated resource for the restore timers, and build supported
legacy network types using hasSystemFeature for wifi, wifi p2p,
bluetooth, proxy types, and TelephonyManager.isDataCapable for the
mobile types.

Bug: 146206136
Test: atest FrameworksNetTests
Change-Id: I3a771d3de6c5e912f18d2834e3a50af797ac4991