Whilst testing fallback functionality, I found that we were
aggressively reducing the resolution if it was not supported. A quick
test found that we could reduce by a much smaller increments.
Performance wise it appears these checks are incredibly quick.
The code for checking supported sizes was duplicated, with one case
having a bug because of this duplication (2/3 case). This CL abstracts
this into a loop.
PiperOrigin-RevId: 499497646
