Fix fuzzer error for FormatConvertFuzzer

The stride was not correct for the fuzzer.
And the FormatConvert have some restructions
on the width and height.

- YUYV
  width and height must be even nmber
- YU12
  width mush be divisible by 16
  height must be even number

Bug: 202641239
Test: FormatConvertFuzzer_copyYV12toBGR32
Change-Id: I45ebea3e22854bdad037abb742fbdbe364b19ec5
1 file changed