Merge "Add network disconnected callback" am: c1657fb7f8 am: edca52ab74

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1652259

Change-Id: Iec2661c2f77a17784f7be963d1a4d8ec8ef483ec
tree: 190ffee47f8aa51d87357b08cf546f7f3f6f2aa9
  1. framework/
  2. service/
  3. OWNERS
  4. TEST_MAPPING