Launcher3 may be malware in android 5.1

Hello to everybody. Sorry for my english.

Recently, I purchased a brand new Ulefone Paris running android 5.1 lollipop. I installed Avg antivirus for android and it alerts me that "Launcher3 maybe is malware". Note that Launcher3 is android' s system app and i have not download/install anything yet unless Avg antivirus for android.
Furthermore, I switched to Ibingo and again switched to Launcher3. After that, scanning my device with Avg antivirus for android the result is clear and it says that my device is safe.
Is my phone infected?

Thank you for your help!

Hello Kapetanios,
Thank you for contacting us with your concerns. We request you to contact our android mobile support team as this community deals with the technical queries regarding AVG Windows products and AVG Android support is provided through email only.
Please click on the following link http://support.avg.com/SupportArticleView?urlname=How-to-contact-support-through-the-Mobile-Contact-Form to contact them from within your AVG app. Thank you.

Hello Kapetanios,
Thank you for contacting us with your concerns. We request you to contact our android mobile support team as this community deals with the technical queries regarding AVG Windows products and AVG Android support is provided through email only.
Please click on the following link http://support.avg.com/SupportArticleView?urlname=How-to-contact-support-through-the-Mobile-Contact-Form to contact them from within your AVG app. Thank you.