Add RNTester example for nested text

Summary:
Existing RNTester examples for text did not contain a case where text with color was nested inside of another with text at both ends. This would have caught T113767991

Changelog:
[Internal] - Add RNTester example for nested text

Reviewed By: mdvacca

Differential Revision: D34874080

fbshipit-source-id: cda91cde9c7449abb677ae9fa936a61e396ffbd3

packages/rn-tester/js/examples/Text/TextExample.android.js

@@ -500,6 +500,16 @@ class TextExample extends React.Component<{...}> {
           <Text style={{fontSize: 12}}>
             <Entity>Entity Name</Entity>
           </Text>
+          <Text style={{fontSize: 8}}>
+            Nested text with size 8,{' '}
+            <Text style={{fontSize: 23}}>size 23, </Text>
+            and size 8 again
+          </Text>
+          <Text style={{color: 'red'}}>
+            Nested text with red color,{' '}
+            <Text style={{color: 'blue'}}>blue color, </Text>
+            and red color again
+          </Text>
         </RNTesterBlock>
         <RNTesterBlock title="Text Align">
           <Text>auto (default) - english LTR</Text>