add missing jest mock in StatusBarManager

Summary:
fix issue https://github.com/facebook/react-native/issues/11701.

Pass current ci

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 [GENERAL] [BUGFIX] [JEST] - add missing jest mock in StatusBarManager

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    CATEGORY
  [----------]      TYPE
  [ CLI      ] [-------------]    LOCATION
  [ DOCS     ] [ BREAKING    ] [-------------]
  [ GENERAL  ] [ BUGFIX      ] [ {Component} ]
  [ INTERNAL ] [ ENHANCEMENT ] [ {Filename}  ]
  [ IOS      ] [ FEATURE     ] [ {Directory} ]   |-----------|
  [ ANDROID  ] [ MINOR       ] [ {Framework} ] - | {Message} |
  [----------] [-------------] [-------------]   |-----------|

 EXAMPLES:

 [IOS] [BREAKING] [FlatList] - Change a thing that breaks other things
 [ANDROID] [BUGFIX] [TextInput] - Did a thing to TextInput
 [CLI] [FEATURE] [local-cli/info/info.js] - CLI easier to do things with
 [DOCS] [BUGFIX] [GettingStarted.md] - Accidentally a thing/word
 [GENERAL] [ENHANCEMENT] [Yoga] - Added new yoga thing/position
 [INTERNAL] [FEATURE] [./scripts] - Added thing to script that nobody will see
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Closes https://github.com/facebook/react-native/pull/19017

Differential Revision: D8014888

Pulled By: hramos

fbshipit-source-id: 1be29f9643cf0faa53ad64f79e11d48b654a97b3

jest/setup.js

@@ -234,6 +234,7 @@ const mockNativeModules = {
     scriptURL: null,
   },
   StatusBarManager: {
+    HEIGHT: 42,
     setColor: jest.fn(),
     setStyle: jest.fn(),
     setHidden: jest.fn(),