public @NonNull Builder addMessageComponent(@NonNull String key, @Nullable byte[] value) {
            throw new RuntimeException("Stub!");
        }
Adds a message component.

@param key The algorithm of the component.
@param value The component data.
@return This builder.
@throws InvalidParameterException If the key is invalid.
android-stub/src/main/java/android/pake/PakeOption.java