Changes to use the proto.textpb config file as the version of the emulator device and show the cipd dependency version in the dependencies so devs know it can be updated.

*List which issues are fixed by this PR. You must list at least one issue. An issue is not required if the PR fixes something trivial like a typo.*
Fixes https://github.com/flutter/flutter/issues/142261

*If you had to change anything in the [flutter/tests] repo, include a link to the migration guide as per the [breaking change policy].*