commit c3168e9c4806049ffd339f8174ffecd57bc359ee
author Aaron Huang <huangaaron@google.com> Wed Dec 25 00:26:47 2019 +0800
committer Aaron Huang <huangaaron@google.com> Mon Feb 03 19:27:57 2020 +0800
tree 8a31f0212d8bd143f155eb3cba9f3c1c2bb49f48
parent 2108944c13f271f68d20557318b99c26d8d5e06a

NetworkPolicyManager: Add @SystemApi for mainlne module

1) Add NetworkPolicyManager.registerSubscriptionCallback and
   NetworkPolicyManager.unregisterSubscriptionCallback for
   registering and unregister.
2) Create SubscriptionCallback to support new @SystemApi
   so that caller could use this object to register and
   unregister.

Bug: 138306002
Test: FrameworksNetTests
      FrameworksTelephonyTests

Change-Id: I56833254a93383e8054c96d296bcb54b777a6e33
Merged-In: I56833254a93383e8054c96d296bcb54b777a6e33