[TL02]Remove hidden API usage of NetworkAgent am: f1594291c4

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1642722

Change-Id: I12342dc4c4ee8748396b7ced2f344611704caa2d
tree: 951140b41f032939364438739427453773bec24f
  1. core/
  2. framework/
  3. service/
  4. services/
  5. tests/
  6. OWNERS
  7. TEST_MAPPING