Translate AHARDWAREBUFFER_FORMAT_Y8Cb8Cr8_420 to NV12

... as this is what Minigbm Gralloc uses as the underlying format
for the flexible YCbCr 420 format.

Bug: b/234047309
Test: `launch_cvd --gpu_mode=gfxstream` with ANGLE on Gfxsteam VK
      and open camera app
Change-Id: If20aaad83d4076ac04301f7391fe809743850a11
1 file changed