Keep the version of dnsresolver consistent with that on mainline-prod.

This is for unblocking Mainline Engprod from adding MTS test configs
to git_master for checking backward compatibility

The version code in the manifest is only used for development
builds, as release builds dynamically replace it.

Bug: 170183552
Test: builds
Change-Id: I62508d699ccddc682aa3943c7ff87005661efb11