Rewrite and re-enable the test (1/n)

The test is rewritten as testNetworkFailedRollback was in ag/9648485 to
empoly more device methods for better logging and debugging.

Bug: 147259494
Test: atest StagedRollbackTest
Change-Id: I4104d20296dee4abba2996f8f9e3b47e258bf6a9