fix for issue 4224:

- plugins are loaded only if called *plugin.so
- providers are loaded only if called *provider.so

Author: mbernasocchi

src/app/qgspluginregistry.cpp

@@ -384,6 +384,8 @@ void QgsPluginRegistry::restoreSessionPlugins( QString thePluginDirString )
 
 #ifdef WIN32
   QString pluginExt = "*.dll";
+#elif ANDROID
+  QString pluginExt = "*plugin.so";
 #else
   QString pluginExt = "*.so*";
 #endif

src/core/qgsproviderregistry.cpp

@@ -78,6 +78,8 @@ QgsProviderRegistry::QgsProviderRegistry( QString pluginPath )
 
 #ifdef WIN32
   mLibraryDirectory.setNameFilters( QStringList( "*.dll" ) );
+#elif ANDROID
+  mLibraryDirectory.setNameFilters( QStringList( "*provider.so" ) );
 #else
   mLibraryDirectory.setNameFilters( QStringList( "*.so" ) );
 #endif