IP connectivity metrics: fix tests after proto update

Update to ipconnectivity.proto in commit
6d2f506b broke the associated unit
tests (Change-Id: I4cf5b95956df721aecd63fddfb026a7266c190b9)

Bug: 34901696
Bug: 65439160
Test: runtest frameworks-net
Merged-In: I57a6bad8a9836b1c45690c4589b416786ce1dfa0

(cherry picked from commit 822c5bf7)

Change-Id: I98b23b2208bbd7d12237fcb000f3cf10c53d9e55