docs: Wi-Fi settings example now uses Settings constant correctly

The constant ACTION_WIFI_SETTINGS is part of the Settings class, not
the Intent class. An example intent for opening settings has been
changed to reflect this class structure.

Bug: 17464977
Change-Id: I160354a11392ad001c127525983a1b84a4dfbe00

docs/html/guide/components/intents-common.jd

@@ -2155,7 +2155,7 @@ that are available.</p>
 <p><b>Example intent:</b></p>
 <pre>
 public void openWifiSettings() {
-    Intent intent = new Intent(Intent.ACTION_WIFI_SETTINGS);
+    Intent intent = new Intent(Settings.ACTION_WIFI_SETTINGS);
     if (intent.resolveActivity(getPackageManager()) != null) {
         startActivity(intent);
     }