ContextHubService: Maintain hub result meaning am: 6d9e7f66 am: 9ea48989

    header[HEADER_FIELD_HUB_HANDLE] = hubHandle;

    header[HEADER_FIELD_APP_INSTANCE] = OS_APP_ID;

    msg[0] = rsp->result;

    // Due to API constraints, at the moment we can't change the fact that

    // we're changing our 4-byte response to a 1-byte value.  But we can prevent

    // the possible change in sign (and thus meaning) that would happen from

    // a naive cast.  Further, we can log when we're losing part of the value.

    // TODO(b/30918279): Don't truncate this result.

    int8_t truncatedResult;

    bool neededToTruncate;

    if (rsp->result < INT8_MIN) {

        neededToTruncate = true;

        truncatedResult = INT8_MIN;

    } else if (rsp->result > INT8_MAX) {

        neededToTruncate = true;

        truncatedResult = INT8_MAX;

    } else {

        neededToTruncate = false;

        // Since this value fits within an int8_t, this is a safe cast which

        // won't change the value or sign.

        truncatedResult = static_cast<int8_t>(rsp->result);

    }

    if (neededToTruncate) {

        ALOGW("Response from Context Hub truncated.  Value was %" PRId32

              ", but giving Java layer %" PRId8,

              rsp->result, (int)truncatedResult);

    }

    msg[0] = truncatedResult;

    if (additionalData) {

        memcpy(&msg[1], additionalData, additionalDataLen);