@Override
    public ScanSettings copyWithCallbackType(@CallbackType int callbackType) {
        return new ScanSettings(
                this.mScanMode,
                callbackType,
                this.mReportDelayMillis,
                this.mMatchMode,
                this.mNumOfMatchesPerFilter,
                this.mLegacy,
                this.mShouldCheckLocationProviderState
        );
    }
Returns report delay timestamp based on the device clock.
rxandroidble/src/main/java/com/polidea/rxandroidble2/scan/ScanSettings.java