configure.ac: Fix Qt Android integration
configure.ac: Fix Qt Android integration

The Qt Android integration is now signalled with HAVE_QT_ANDROID

See: https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/merge_requests/86

GStreamer/gst-plugins-good,pexip/gst-plugins-good,GStreamer/gst-plugins-good,pexip/gst-plugins-good,pexip/gst-plugins-good,pexip/gst-plugins-good,GStreamer/gst-plugins-good,pexip/gst-plugins-good,GStreamer/gst-plugins-good