QtVirtualKeyboard not installed by default for Qt Android versions

When having a project that uses qtvirtualkeyboard on desktop, it's not a one-click job to run it on Android. Because qtvirtualkeyboard is not installed by default for Android versions, the user needs to either manually install the module or remove parts of the QML code that relies on qtvirtualkeyboard.

It's better to fix this issue either by including virtualkeyboard for Android by default or modify qtvirtualkeyboard to use Android's native keyboard when running on Android.