Typo fixes

Summary:
Spotted a few typos while going through the source code

No tests are required

[INTERNAL] [MINOR] [Webview] - Fixed typos
Closes https://github.com/facebook/react-native/pull/19462

Differential Revision: D8176774

Pulled By: hramos

fbshipit-source-id: f1a9024b210e1a935dcdccd7e27daedb71d794bc

Libraries/Components/WebView/WebView.android.js

@@ -181,7 +181,7 @@ class WebView extends React.Component {
      * List of origin strings to allow being navigated to. The strings allow
      * wildcards and get matched against *just* the origin (not the full URL).
      * If the user taps to navigate to a new page but the new page is not in
-     * this whitelist, the URL will be oppened by the Android OS.
+     * this whitelist, the URL will be opened by the Android OS.
      * The default whitelisted origins are "http://*" and "https://*".
      */
     originWhitelist: PropTypes.arrayOf(PropTypes.string),
@@ -225,7 +225,7 @@ class WebView extends React.Component {
        */
       props: PropTypes.object,
       /*
-       * Set the ViewManager to use for communcation with the native side.
+       * Set the ViewManager to use for communication with the native side.
        * @platform ios
        */
       viewManager: PropTypes.object,

Libraries/Components/WebView/WebView.ios.js

@@ -388,7 +388,7 @@ class WebView extends React.Component {
        */
       props: PropTypes.object,
       /*
-       * Set the ViewManager to use for communcation with the native side.
+       * Set the ViewManager to use for communication with the native side.
        * @platform ios
        */
       viewManager: PropTypes.object,