Merge "Add python library build rule" into main

python_library_host {

    name: "soong-metrics-proto-py",

    srcs: [

        "metrics.proto",

    ],

    visibility: [

        "//build/make/ci",

    ],

    libs: [

        "libprotobuf-python",

    ],

    proto: {

        include_dirs: ["external/protobuf/src"],

        canonical_path_from_root: false,

    },

}