Android plugins dependencies detection might have a potential issue

The plugins dependencies detection with qt_internal_android_dependencies() is run only once per module and if a separate module adds some plugins to an existing module it might not get updated correctly to the dependency xml files used by androiddeployqt.

An example of a case is a module that define a plugin cutomPlugin under QtGui, that customPlugin won't get updated because QtGui dependencies are only run once when qtbase is built.