gralloc: Update enum value for ITU_R_709_FR

Update the values of defines as it was done previously. Reordering
value of defines will cause backward compatibility issues. Update
value of ITU_R_709_FR as a new enum value which was not used
previously.

Change-Id: Ief47e131863e6d01481f1d5c2097bd7ce100cd7a
3 files changed