Merge tag 'v1.3' into master am: 245786e6c1 am: 47f081e3b1 am: 843bac4081

Original change: https://android-review.googlesource.com/c/platform/external/libopus/+/1425908

Change-Id: I56badb3d8d06e18f2e0a452fb1229bca6c03d3d3