Use Apex mechanism with Qt for Android

The QAA-140 concluded that the new Apex mechanism for handling Android libraries can be used to include Qt for Android libraries. The Apex mechanism could potentially be a replacement for the deprecated Ministro tool. This ticket shall keep track of the development of Apex and whether/how it can be brought into Qt for Android.

The Apex is not stable yet, and we don't know when a stable version will be available. However, if we go with this approach we should use finding from QAA-140, to allow Qt to use the new libs path, and also androiddeployqt and QC should have some patches to allow using this mechanism.