Merge "mpeg4enc: Ignore integer overflow in encoder idct functions" am: 01fd6fefb1 am: ac8e138cdb am: 6d62c6e2e0

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/1772936

Change-Id: I2e51dbbb872d536a667f508121e64af5d33b4146