Support additional UIBarStyle's in RCTConvert (#20102)

Summary:
Adds two additional UIBarStyles to RCTConvert

- [x] UIBarStyleBlackOpaque
- [x] UIBarStyleBlackTranslucent

Does not affect any tests or current usage of this conversion.
Pull Request resolved: https://github.com/facebook/react-native/pull/20102

Differential Revision: D13421942

Pulled By: hramos

fbshipit-source-id: 1e609eca0fdea2b56b9f6ac87e759c661bdee12b

React/Base/RCTConvert.m

@@ -422,6 +422,8 @@ RCT_ENUM_CONVERTER(UIViewContentMode, (@{
 RCT_ENUM_CONVERTER(UIBarStyle, (@{
   @"default": @(UIBarStyleDefault),
   @"black": @(UIBarStyleBlack),
+  @"blackOpaque": @(UIBarStyleBlackOpaque),
+  @"blackTranslucent": @(UIBarStyleBlackTranslucent),  
 }), UIBarStyleDefault, integerValue)
 #endif