[cas] Update BUILD.bazel (#312)
[cas] Update BUILD.bazel (#312)

Include retry package.

This change should have been a part of
https://github.com/bazelbuild/remote-apis-sdks/commit/fd877b05ba2ed611f6d34e711da05917b729eff9
bazelbuild/remote-apis-sdks,bazelbuild/remote-apis-sdks