Avoid closing invalid FD in Surface and GraphicBufferMapper

GraphicBufferMapper::lockAsync{,YCbCr} close the fence FD even when the FD
is invalid.

Change-Id: Ia2b4dae3b2c06426e34f623f19ba92435f486ab7
(cherry picked from commit dcfe91e1f3f15b68793a69650f9bd0ca6a58ff4c)
1 file changed