Use pip_install_gr so we get the version pinned by requirements. The
depends-on is an example of where we're trying to pin to workaround
issues.
Depends-On: I9c57c08a150571c5bb62235d502839394d53a4c1
Change-Id: I780cca681b12a3e9d228dbf2fd9fa6e8ab1a82e1