Enum State defines possible states of private connection.
Values:
STATE_UNSPECIFIED (0):
The default value. This value is used if the
state is omitted.
CREATING (1):
The private connection is being created.
ACTIVE (2):
The private connection is ready.
UPDATING (3):
The private connection is being updated.
DELETING (4):
The private connection is being deleted.
UNPROVISIONED (5):
The private connection is not provisioned,
since no private cloud is present for which this
private connection is needed.
FAILED (6):
The private connection is in failed state.