Do not use max/min luminance if it's 0

Do not set SMPTE2086 if max/min luminance fields are 0,
these may indicate that max/min luminance is not present
in the bitstream. Let GPU composition use default if needed.

Bug: 153847809
Test: Play Netflix HDR content in GPU composition.
Change-Id: Ibce5319f7832095314fe07b0ce13600658ce4627
1 file changed