Add StyleSheet import (#1287)

Co-authored-by: Satyajit Sahoo <satyajit.happy@gmail.com>

Author: Joehoel

versioned_docs/version-6.x/bottom-tab-navigator.md

@@ -303,6 +303,7 @@ Function which returns a React Element to use as background for the tab bar. You
 
 ```js
 import { BlurView } from 'expo-blur';
+import { StyleSheet } from 'react-native';
 
 // ...
 

versioned_docs/version-6.x/elements.md

@@ -176,6 +176,7 @@ For example, you can use this with `headerTransparent` to render a blur view to
 
 ```js
 import { BlurView } from 'expo-blur';
+import { StyleSheet } from 'react-native';
 
 // ...
 

versioned_docs/version-7.x/bottom-tab-navigator.md

@@ -401,6 +401,7 @@ Function which returns a React Element to use as background for the tab bar. You
 
 ```js
 import { BlurView } from 'expo-blur';
+import { StyleSheet } from 'react-native';
 
 // ...