runtimes/google/ipc: Remove broken imports.
runtimes/google/ipc: Remove broken imports.

The example code moved to a different repo, breaking the android build.
Removing these references seems to make everything happy.

Change-Id: Id4e84a41467f06c053592e26e1013219089a9dd5

vanadium/go.jni,vanadium/go.jni