[Settings] Request focus in Add network dialog

Request focus for SSID EditText to show IME when user choose add network in wifi
screen.

Bug: 72882629
Test: RunSettingsRobotests & Manual test
Change-Id: Iaf4db085c3d310a7f524217a90dc1fb7573d6814

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

@@ -215,6 +215,7 @@ public class WifiConfigController implements TextWatcher,
 
             mSsidView = (TextView) mView.findViewById(R.id.ssid);
             mSsidView.addTextChangedListener(this);
+            mSsidView.requestFocus();
             mSecuritySpinner = ((Spinner) mView.findViewById(R.id.security));
             mSecuritySpinner.setOnItemSelectedListener(this);
             mView.findViewById(R.id.type).setVisibility(View.VISIBLE);