Values:
STATUS_UNSPECIFIED (0):
Zero is an illegal value.
ENABLED (1):
New transfers are performed based on the
schedule.
DISABLED (2):
New transfers are not scheduled.
DELETED (3):
This is a soft delete state. After a transfer job is set to
this state, the job and all the transfer executions are
subject to garbage collection. Transfer jobs become eligible
for garbage collection 30 days after their status is set to
DELETED.