Fixed a SIM Lock UI issue

+ The SIM lock option will now appear if there is any SIM with locking
capabilities.
+ Also, if the first slot does not have a SIM in it, then the SIM lock
screen will disable the ability to lock the first slot.

Bug: 18473536
Change-Id: Ib4e0ed6e94b00bc07c9febdad433fdb3c55294b8

src/com/android/settings/IccLockSettings.java

@@ -221,9 +221,13 @@ public class IccLockSettings extends PreferenceActivity
                             ? context.getString(R.string.sim_editor_title, i + 1)
                             : subInfo.getDisplayName())));
             }
-        }
+            final SubscriptionInfo sir = Utils.findRecordBySlotId(getBaseContext(), 0);
 
-        mPhone = PhoneFactory.getDefaultPhone();
+            mPhone = (sir == null) ? null
+                : PhoneFactory.getPhone(SubscriptionManager.getPhoneId(sir.getSubscriptionId()));
+        } else {
+            mPhone = PhoneFactory.getDefaultPhone();
+        }
         mRes = getResources();
         updatePreferences();
     }