Move mimetype definitions to plugin specs

- Avoids the hassle of QRC files and manually registering mime types
- Avoids performance regressions because of mime types that are
  registered after mime database has been used
- Makes it technically possible to detect that a disabled plugin could
  handle a mime type if it was enabled

Change-Id: I373008b1b56e9c6b4853055f20b3eeb112a6eff9
Reviewed-by: Christian Stenger <christian.stenger@qt.io>
Reviewed-by: hjk <hjk@qt.io>

src/plugins/android/androidplugin.cpp

@@ -52,8 +52,6 @@
 
 #include <qtsupport/qtversionmanager.h>
 
-#include <utils/mimetypes/mimedatabase.h>
-
 #include <QtPlugin>
 
 using namespace ProjectExplorer;
@@ -81,8 +79,6 @@ bool AndroidPlugin::initialize(const QStringList &arguments, QString *errorMessa
     addAutoReleasedObject(new Internal::JavaEditorFactory);
     KitManager::registerKitInformation(new Internal::AndroidGdbServerKitInformation);
 
-    Utils::MimeDatabase::addMimeTypes(QLatin1String(":/android/Android.mimetypes.xml"));
-
     addAutoReleasedObject(new Internal::AndroidManifestEditorFactory);
 
     connect(KitManager::instance(), &KitManager::kitsLoaded,