Creates a new tag definition in this ExifInterface object for a given TID and default IFD. Creating a definition with the same TID and default IFD as a previous definition will override it.
Return
the defined tag constant (e.g. {@see #ExifTagKey.IMAGE_WIDTH} ) or {@see #ExifTagKey.NULL} if the definition could not be made.
Parameters
allowedIfds
the IFD's this tag is allowed to be put in.
defaultComponentCount
the number of elements of this tag's type in the tags value.