Improve error reporting: Extract original message when showing "Java exception messages" consistently. Improve error handling in deprecated OneDrive API stub and avoid crash by no-longer throwing in Main-thread methods.

src/keepass2android-app/search/SearchTotpResults.cs

@@ -96,7 +96,7 @@ namespace keepass2android.search
             catch (Exception e)
             {
                 Kp2aLog.LogUnexpectedError(e);
-                App.Kp2a.ShowMessage(this, e.Message,  MessageSeverity.Error);
+                App.Kp2a.ShowMessage(this, Util.GetErrorMessage(e),  MessageSeverity.Error);
                 Finish();
                 return;
             }