[automerger skipped] Merge Android R (rvc-dev-plus-aosp-without-vendor@6692709) am: a7a7c08bf9 -s ours am: 12f14280f1 -s ours am: abc356a3b2 -s ours am: 80f4bc4cd3 -s ours am: 5128715828 -s ours

am skip reason: Change-Id Ie6dff8b4043f84b9d9282364d17ec001b5bacc62 with SHA-1 da6bf64cf9 is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/grpc-grpc/+/12470113

Change-Id: I5000e84dbd3b4ff4cda183a3dad77a20b7957d32