Fix enabling of submit button

Change I478c915b introduced a regression where the submit
button is enabled even if no password is entered for a secure
network.

This happened because our checks would override a password
check when IP and proxy settings are valid (which is the default
setting)

Bug: 4462439
Change-Id: Icd3fde90759f33fa391ec79ae8075b6d8388d2e9

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

@@ -271,14 +271,12 @@ public class WifiConfigController implements TextWatcher,
             (mAccessPointSecurity == AccessPoint.SECURITY_PSK && mPasswordView.length() < 8)))) {
             enabled = false;
         } else {
-            enabled = true;
-        }
-
             if (ipAndProxyFieldsAreValid()) {
                 enabled = true;
             } else {
                 enabled = false;
             }
+        }
         submit.setEnabled(enabled);
     }