setSourceRectHint
Sets the source bounds hint. These bounds are only used when an activity first enters picture-in-picture, and describe the bounds in window coordinates of activity entering picture-in-picture that will be visible following the transition. For the best effect, these bounds should also match the aspect ratio in the arguments.
Return
the PictureInPictureManager instance.
Parameters
sourceRectHint
window-coordinate bounds indicating the area of the activity that will still be visible following the transition into picture-in-picture (eg. the video view bounds in a video player)