Change build deps to match the new paths in the proto repo.
Change build deps to match the new paths in the proto repo.

The paths in the proto repo were changed to match Gradle conventions.
This also removes calls to a gRPC method that no longer exists from
test code.

Change-Id: I932b4f162eb3ebfc711c38a7b1daadb923d49265

world-federation-of-advertisers/common-jvm,world-federation-of-advertisers/common-jvm