Merge "Add SystemMessages protos to Connectivity" am: 470e9e0e19 am: 5cf377d2a3 am: 898073e357

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1626204

Change-Id: Ia8a06a0d6f5dcdbdc672149ff206aada83478f23
tree: 76508e67df56aa34a003f55f37660d2ea9357a32
  1. framework/
  2. service/
  3. OWNERS