Merge "Use protobuf 2.x instead of 3.x" into tm-qpr-dev-plus-aosp am: 76fcbfbb am: 48678581

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/22324319



Change-Id: I7b6eec6f35f17123fdfbe17f04378616f84cdfc5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>