mocks: Introduce mock_btif_sock_rfc am: 0e31b6b3 am: 5bc1755b am: 103db81b am: aafbd6fb

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2781498



Change-Id: Ida704925c6955a19b5470a3e6acd86f2422de60e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>