Convert RGB Pixel Coordinates to UV coordinates

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Description:

This function accepts pixel coordinates on the RGB Stream, and returns the UV coordinates which match this position on the RGB Stream texture.

Inputs:

• Target [KinectInterfaceComponent]: The Unreal Engine/Kinect interface object.
• RGB Pixel Coordinates [Vector2D]: The pixel coordinates (x, y) which should be 
  converted to the UV coordinates at this location on the RGB Stream image.

Outputs:

• Input Is Valid [Boolean]: Returns true if the input coordinate is contained within the bounds of the RGB Stream image, otherwise returns false.
• Return Value [Vector2D]: The UV coordinates which match the location of the 
  given pixel coordinates on the RGB Stream image.