Merge "m4v_h263: Fix integer-overflow in decoder IDCT functions" am: 7a0123c6e6 am: 54a220bfb8

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/1398269

Change-Id: I78e56101033d1d2396482040a557dbb2c13f78f0