Prevent crash from unknown mime type

        for (const auto& type : typeMap) {

            const auto& typeName = type.first;

            const char* roleName = GetComponentRole(isEncoder, typeName.data());

            if (roleName == nullptr) {

                ALOGE("Cannot find the role for %s of type %s",

                        isEncoder ? "an encoder" : "a decoder",

                        typeName.data());

                continue;

            }

            const auto& typeAttributeMap = type.second;

            auto roleIterator = mRoleMap.find(roleName);