Request focus in wifi screen in add network and secure wifi

Request focus from parent view in controller. Based on framework
patch, it can be placed in a parent and focus will go to whatever view
is the default focusable in that hierarchy.

Fixes: 68776177
Fixes: 72882629
Test: RunSettingsRobotests and Manual test
Change-Id: I3bcdc4ec814f68079a00e40435f46bdfa53f4425

src/com/android/settings/wifi/WifiConfigController.java

@@ -363,6 +363,9 @@ public class WifiConfigController implements TextWatcher,
         if (mConfigUi.getSubmitButton() != null) {
             enableSubmitIfAppropriate();
         }
+
+        // After done view show and hide, request focus from parent view
+        mView.findViewById(R.id.l_wifidialog).requestFocus();
     }
 
     @VisibleForTesting