Android WebView “tel:” links show web page not found - issue fixed

Summary:
Submitting PR #6810 -  Android WebView “tel:” links show web page not found - issue fixed.
'tel:' link web page not loading:
![screenshot_2016-07-01-19-48-05](https://cloud.githubusercontent.com/assets/11989113/16525364/b3e9f10c-3fc9-11e6-8119-93cdf24d54df.png)

After Fixing the issue:
![screenshot_2016-07-01-19-52-00](https://cloud.githubusercontent.com/assets/11989113/16525371/c0d74d92-3fc9-11e6-899b-570a940692f6.png)
Closes #8526

Differential Revision: D3554500

fbshipit-source-id: e8cc1ac4c36ddf0c6b261a29b2e038caddc03e75

ReactAndroid/src/main/java/com/facebook/react/views/webview/ReactWebViewManager.java

@@ -41,6 +41,8 @@
 import com.facebook.react.uimanager.annotations.ReactProp;
 import com.facebook.react.uimanager.events.Event;
 import com.facebook.react.uimanager.events.EventDispatcher;
+import android.content.Intent;
+import android.net.Uri;
 
 /**
  * Manages instances of {@link WebView}
@@ -111,6 +113,18 @@ public void onPageStarted(WebView webView, String url, Bitmap favicon) {
               createWebViewEvent(webView, url)));
     }
 
+    @Override
+    public boolean shouldOverrideUrlLoading(WebView view, String url) {
+        if (url.startsWith("http://") || url.startsWith("https://")) {
+          return false;
+        } else {
+          Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url)); 
+          intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+          view.getContext().startActivity(intent);   
+          return true;   
+        }              
+    }
+
     @Override
     public void onReceivedError(
         WebView webView,