commit 7664f62d37f55099e1b913373efcc7a613154dd6
author junyulai <junyulai@google.com> Fri Mar 12 20:05:08 2021 +0800
committer junyulai <junyulai@google.com> Tue Mar 16 21:30:55 2021 +0800
tree a1ef19337c606bb8ec29f9d08e792865665d5f75
parent 4fe7ff8d1f23b9c0bbba5032271b512bed7b457c

[VCN13] Implement tracking best matching network

This is done by:
  1. In requestNetwork, provide a basic permission check.
  2. rematchNetworksAndRequests: no change, since non listen
     requests will be automatically processed to track
     best satisfying network.
  3. applyNetworkReassignment: no change, since non-request
     will not be sent to factories.

Test: atest ConnectivityServiceTest#testRegisterBestMatchingNetworkCallback_noIssueToFactory
Test: atest ConnectivityServiceTest#testRegisterBestMatchingNetworkCallback_trackBestNetwork
Bug: 175662146
Change-Id: I8cf4ab334df6812d84cdda160e9b72b6f54062af