[TL02]Remove hidden API usage of NetworkAgent am: d90927f218

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

Change-Id: I12342dc4c4ee8748396b7ced2f344611704caa2d
tree: db2aeb1afe6a34cfeeb82bbfa8245d40a076d594
  1. framework/
  2. service/
  3. OWNERS
  4. TEST_MAPPING