Fix a flaky test.

If a test with an initialized fake factory was run before this test, it
passed. If it runs first, though, it would flake. By initializing the
fake factory in the test, it shouldn't flake anymore.

Change-Id: I3ecb7477b6b29d093059f01d5dc0124690fb15b3
Fixes: 62103876
Test: Robotests pass