This patch adds a version field to ipconnectivity.proto and populates it
to 2, which is the logical version number for NYC-MR2.
Test: IpConnectivity{EventBuilder,Metrics}Test pass
Bug: 32127906
(cherry picked from commit 79a739cbf3)
Change-Id: I5f37633afd9ec82f5402c5b6670fe2febae82a14