Connectivity metrics: update ipconnectivity.proto

Bug: 34901696
Bug: 65439160
Test: $runtest frameworks-net
      build, flashed, booted phone, $ adb shell dumpsys connmetrics list

Merged-In: I4cf5b95956df721aecd63fddfb026a7266c190b9

(cherry picked from commit 6d2f506b)

Change-Id: I0fb40d7b644786efc839468b2d7e1cfcedd71ad8