Fix for the missing focus in WebView form fields.

This looks like a regression for WebView (58.0.3029.125) in android
'O'. But this seems to have been fixed in early version of 60 (webview).
This workaround gets us past the problem, until we get the newer version
of WebView.

Bug: 62449959
Test: Manual
Change-Id: I29883bf7d1567c1ce7be90b4efde4b3da93b99a2

packages/CaptivePortalLogin/src/com/android/captiveportallogin/CaptivePortalLoginActivity.java

@@ -360,6 +360,9 @@ public class CaptivePortalLoginActivity extends Activity {
                 return;
             } else if (mPagesLoaded == 2) {
                 // Prevent going back to empty first page.
+                // Fix for missing focus, see b/62449959 for details. Remove it once we get a
+                // newer version of WebView (60.x.y).
+                view.requestFocus();
                 view.clearHistory();
             }
             testForCaptivePortal();