Defines the ad stitching behavior in case the ad duration does not
align exactly with the ad break boundaries. If not specified, the
default is CUT_CURRENT.
Values:
STITCHING_POLICY_UNSPECIFIED (0):
Stitching policy is not specified.
CUT_CURRENT (1):
Cuts an ad short and returns to content in
the middle of the ad.
COMPLETE_AD (2):
Finishes stitching the current ad before
returning to content.