@Override
    void assembleMessageParameters() {
        mAid = SecureUtils.calculateK4(mAppKey.getKey());
        BitWriter bitWriter = new BitWriter(SCHEDULER_ACTION_SET_INDEX_PARAMS_LENGTH);
        entry.assembleMessageParameters(bitWriter);
        bitWriter.write(index, 4);
        mParameters = ArrayUtils.reverseArray(bitWriter.toByteArray());
    }
Scheduler Action Set is an acknowledged message used to set the entry of the Schedule Register state of an element (see Mesh Model Spec. v1.0.1 Section 5.1.4.2), identified by the Index field.
The response to the Scheduler Action Set message is a Scheduler Action Status message.

@param appKey the appkey
@param index  Index of the Schedule Register entry to set
@param entry  Bit field defining an entry in the Schedule Register
mesh/src/main/java/no/nordicsemi/android/mesh/transport/SchedulerActionSet.java