Calling Paper TextInput setTextAndSelection view command now dirties layout

Summary:
Changelog: [Internal]

Previously `setTextAndSelection` was not dirtying layout. This would cause an issue where `setTextAndSelection` causes layout change. For example calling setTextAndSelection with empty string on a multiline auto expanding text input.

I changed one example in TextInputSharedExamples.js, "Live Re-Write (no spaces allowed) and clear" example is now multiline. This allows to test whether `setTextAndSelection` dirties layout. Enter multiline string to to the example text input and press clear. Observe that the text input shrinks to single line height.

Reviewed By: shergin

Differential Revision: D21182990

fbshipit-source-id: de8501ea0b97012cf4cdf8d5f658649139f92da6

RNTester/js/examples/TextInput/TextInputSharedExamples.js

@@ -161,9 +161,9 @@ class RewriteInvalidCharactersAndClearExample extends React.Component<
           ref={ref => {
             this.inputRef = ref;
           }}
-          multiline={false}
+          multiline={true}
           onChangeText={text => {
-            this.setState({text: text.replace(/\s/g, '')});
+            this.setState({text: text.replace(/ /g, '')});
           }}
           style={styles.default}
           value={this.state.text}