Method for commute. Walking, biking and wheelchair accessible
transit is still in the Preview stage.
Values:
COMMUTE_METHOD_UNSPECIFIED (0):
Commute method isn't specified.
DRIVING (1):
Commute time is calculated based on driving
time.
TRANSIT (2):
Commute time is calculated based on public
transit including bus, metro, subway, and so on.
WALKING (3):
Commute time is calculated based on walking
time.
CYCLING (4):
Commute time is calculated based on biking
time.
TRANSIT_ACCESSIBLE (5):
Commute time is calculated based on public
transit that is wheelchair accessible.