Construct DisplayManagerHelper

MainActivity.kt

 try {
            // Try to construct the DisplayMangerHelper.
            // If it isn't successful, this device isn't LG dual screens
            displayManagerHelper = DisplayManagerHelper(applicationContext)
            coverDisplayCallback = MainCoverDisplayCallback()
            smartCoverCallback = MainSmartCoverCallback()

            // Register the callbacks for covers
            displayManagerHelper?.registerCoverDisplayEnabledCallback(
                applicationContext.packageName,
                coverDisplayCallback
            )
            displayManagerHelper?.registerSmartCoverCallback(smartCoverCallback)
            isLGDualScreen = true
        } catch (e: Exception) {
            isLGDualScreen = false
            Log.e(TAG, "This device isn't LG dual screens", e)
        }