Add connectivity protos to framework-connectivity am: 953819d7f0 am: 00b56b8d0d

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1635040

Change-Id: Ieaa65408c13f5224b23cae8a4cebf79b4d7ed676
tree: ff6c04a1d627d9fbf3283a9372affeef642175fc
  1. core/
  2. framework/
  3. service/
  4. services/
  5. tests/
  6. OWNERS