system/include/Android.bp

cc_library_headers {
    name: "avrcp_headers",
    defaults: ["libchrome_support_defaults"],
    export_include_dirs: ["./hardware/avrcp/"],
    header_libs: ["internal_include_headers"],
    export_header_lib_headers: ["internal_include_headers"],

    // We need this in case some file outside of the Bluetooth project includes
    // bluetooth.h but doesn't include libchrome which avrcp.h depends on.
    export_shared_lib_headers: ["libchrome"],

    vendor_available: true,
    host_supported: true,
}

cc_library_headers {
    name: "libbluetooth_headers",
    defaults: ["libchrome_support_defaults"],
    header_libs: [
        "avrcp_headers",
        "libbluetooth-types-header",
    ],
    export_header_lib_headers: [
        "avrcp_headers",
        "libbluetooth-types-header",
    ],
    export_include_dirs: ["./"],
    vendor_available: true,
    host_supported: true,
}