fix newly introduce issue on PasswordActivity: Preloading was not started correctly, causing potential crash when trying to work offline

src/keepass2android/PasswordActivity.cs

@@ -1787,7 +1787,7 @@ namespace keepass2android
 				{
 					// OnResume is run every time the activity comes to the foreground. This code should only run when the activity is started (OnStart), but must
 					// be run in OnResume rather than OnStart so that it always occurrs after OnActivityResult (when re-creating a killed activity, OnStart occurs before OnActivityResult)
-					if (!_starting)
+					if (_starting)
 					{
 
 						_starting = false;