Fix mismatch in UIAccessibilityAction selector method

[maicki]

A UIAccessibilityCustomAction can be initialized with a target and a selector. The selector is expecting methods with the following signature:

- (BOOL)performAccessibilityCustomAction;
- (BOOL)performAccessibilityCustomAction:(UIAccessibilityCustomAction *)action;

Within Texture we use a different signature:

- (void)performAccessibilityCustomAction:(UIAccessibilityCustomAction *)action;

This diff will update the Texture API to adapt the correct API for a UIAccessibilityCustomAction:

• (BOOL)performAccessibilityCustomAction:(UIAccessibilityCustomAction *)action;