static byte[] generateOOBNumeric(final int oobSize) {
        final Random random = new Random();
        final int value = random.nextInt((int) Math.pow(10, oobSize));
        MeshLogger.verbose(TAG, "Random OOB numeric: " + value);
        return intToBytes(value);
    }
Generates a random number to be entered on the device

<p>
Based on mesh profile specification v1.0.1 section 5.4.2.4 page 254
</p>

@param oobSize oob size
mesh/src/main/java/no/nordicsemi/android/mesh/utils/MeshParserUtils.java