Add API that allows to specify the list of Qt module plugins that should be included in apk

The current dependency scanning mechanism of androiddeployqt is implemented the way that we try to add to an apk all the plugins that belong to the linked Qt module.
So if App1 links QtLib1.so, androiddeployqt will try to pack all the plugins that belong to QtLib1.so.
As user I would like either to have an option where I could specify only essential plugins that are required for my application or to exclude unwanted plugins from apk.