Merge "m4v_h263: Fix integer-overflow in decoder IDCT functions" am: 7a0123c6e6 am: 54a220bfb8 am: f34e99d5c0

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

Change-Id: I523f7da5445b35025ea24e82f756d9b61d792aab