nativeInitializeAccessible

This method should be called on custom Accessible creation (or its context if context is created lazily).

JDK's accessibility support (at least for MacOS) builds mapping AccessibleContext -> Accessible. Some Accessible are built only when focus is settled and since we have a hack NativeAccessibleFocusHelper.requestNativeFocusOnAccessible, wrong mapping can be built (ComponentAccessibleContext -> SkiaLayer instead of ComponentAccessibleContext -> ComponentAccessible).

This method forces JDK's accessibility support to cache mapping ComponentAccessibleContext -> ComponentAccessible, if it is called on ComponentAccessibleContext creation.

Related to the issue.