reset local to "en"

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

Author: AndyScherzinger

app/screenshots/gplay/debug/com.owncloud.android.ui.dialog.DialogFragmentIT_testConfirmationDialogWithOneAction.png

@@ -415,10 +415,11 @@ protected void enableRTL() {
     }
 
     protected void resetLocale() {
+        Locale locale = new Locale("en");
         Resources resources = InstrumentationRegistry.getInstrumentation().getTargetContext().getResources();
-        Configuration defaultConfig = resources.getConfiguration();
-        defaultConfig.setLocale(Locale.getDefault());
-        resources.updateConfiguration(defaultConfig, null);
+        Configuration config = resources.getConfiguration();
+        config.setLocale(locale);
+        resources.updateConfiguration(config, null);
     }
 
     protected void screenshot(View view) {