Use monotonic clock for vault timeout (#1175)

* Use monotonic clock for vault timeout

* free memory

* removed vault timeout timers and added crash logging to iOS clock hack

src/App/Abstractions/IDeviceActionService.cs

@@ -43,5 +43,6 @@ namespace Bit.App.Abstractions
         void OpenAccessibilityOverlayPermissionSettings();
         void OpenAutofillSettings();
         bool UsingDarkTheme();
+        long GetActiveTime();
     }
 }