Update acloud_proto library to generate python proto files.

We were originally using manually generated python proto files, utilize
the Android Build to do it for us and delete the manually generated
files.

Also update run_tests.sh to generate the proto py files so we can
continue to run unittests and get coverage data.

Bug: 110430047
Test: m acloud && out/host/linux-x86/bin/acloud
./run_tests.sh
Change-Id: Ib515d405f17d84ae356ad7491cf18757536a4806
5 files changed