fix(ios/background): Fix background clear #10415
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PR Checklist
What is the current behavior?
Right now seems it can happen that the
layer
of the background ends up undefined in some situations. As an example I have a view with List that navigates to a page with a BottomNavigation. When navigating back to the list thelayer
ends up undefined and the app crashes.What is the new behavior?
Adds a safety check before trying to reset the layer's mask thus resolving the crash.
Fixes/Implements/Closes #[Issue Number].