You should get a response in a day or two.
Whilst there are some in the forums who can help in why there might have been a detection, e.g. checking other security related sites. However, as far as android apps go this is more difficult as those sites are generally analysing physical web sites rather than apps.
That said if you look at the Relations tab in the VT results there are some considered a detection 1/88 (Avast Mobile in the original detection tab), however the Avast for Windows product doesn't detect this in the main VT results detection tab.