Merge tag 'v1.28.0' am: 615c5d6d6b am: 8f04be94f6 am: f06909aba3

Original change: https://android-review.googlesource.com/c/platform/external/golang-protobuf/+/2046950

Change-Id: I0640a49bc9c6cb5228fae5bda5f747ee39aa7252
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>