Values:
STATE_UNSPECIFIED (0):
Default value. This value is unused.
ACTIVE (1):
The subscription can actively send messages
to BigQuery
PERMISSION_DENIED (2):
Cannot write to the BigQuery table because of
permission denied errors.
NOT_FOUND (3):
Cannot write to the BigQuery table because it
does not exist.
SCHEMA_MISMATCH (4):
Cannot write to the BigQuery table due to a
schema mismatch.