Merge "m4v_h263: Fix integer-overflow in decoder IDCT functions" am: 7a0123c6e6 am: 54a220bfb8 am: f34e99d5c0 am: 47c064df2d am: f4603403a5

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

Change-Id: Ibd9e72aeb13f96081c8638ef4c6aad3b306a0727