https://g3doc.corp.google.com/experiments/g3doc/mobile/phenotype/android/testing.md?cl=head#hermetic
Phenotype talks to a server to override the device config changes made
by the tests. Therefore, watchdog timeout didn't happen as expected and
caused tests to fail.
We need to override the flags on our own during tests so the
device config values ('watchdog_request_timeout_millis' in this case)
won't be changed in an unexpected way.
See b/148042585#comment21 for more details.
Bug: 148042585
Test: atest NetworkStagedRollbackTest
Change-Id: I4d8944f7fef93445de8f971c6a96fef7c71872db
6033dd2c58