Stop using platform-specific names for props

Summary:
Follows up on [this comment](https://github.com/facebook/react-native/pull/5065#issuecomment-168353782) by nicklockwood in #5065.

Rely on using the platform annotation and keep the API / naming less redundant.
Closes https://github.com/facebook/react-native/pull/5081

Reviewed By: svcscm

Differential Revision: D2803143

Pulled By: nicklockwood

fb-gh-sync-id: 9bdf028f5022ef46fcb63aa6c3fc931fdcc46f2b

Examples/UIExplorer/WebViewExample.js

@@ -94,8 +94,8 @@ var WebViewExample = React.createClass({
           automaticallyAdjustContentInsets={false}
           style={styles.webView}
           url={this.state.url}
-          javaScriptEnabledAndroid={true}
-          domStorageEnabledAndroid={true}
+          javaScriptEnabled={true}
+          domStorageEnabled={true}
           onNavigationStateChange={this.onNavigationStateChange}
           onShouldStartLoadWithRequest={this.onShouldStartLoadWithRequest}
           startInLoadingState={true}