Merge "mp3dec: Disable integer overflow errors in dct_6 and mdct_6" into mainline-prod am: 0cb3d5deef

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/12649836

Change-Id: I521a3252114f4d018b0aae3a599103a8ce08e8fd