onAnnouncementGenerated
Called whenever the upcoming maneuver announcement has been generated.
The announcement is generated based on the distance to maneuver, current instruction, and the next instruction. Configure the announcement verbosity by changing the property GuidanceEngine.announcementMode. If the property GuidanceEngine.announcementsEnabled is set to false, this method will not be invoked.
Parameters
announcement
GuidanceAnnouncement about the upcoming maneuver.
shouldPlay
Whether the announcement should be triggered.