Fix Registry exception for custom view wrapper

Fix Registry exception for custom view wrapper

1. PanGesture from Accessibility create new handle in
dali csharp side. We need to have memory ownership, but
don't need to register it on NUI side. We can ignore it.

2. For Animation and StyleManager, it is possible to use
that 'already registered' BaseHandle. But in this case,
we should not dispose it by our self.

Signed-off-by: Eunki Hong <eunkiki.hong@samsung.com>