Use clock's widget as the default keyguard widget

Also, if we have no widgets in lockscreen,
reinflate the default widget. If that fails,
inflate the built-in clock (KeyguardStatusView)

Change-Id: I2e90ab0893c993a755700e075e4a8ac5a685e0f2
diff --git a/services/java/com/android/server/AppWidgetServiceImpl.java b/services/java/com/android/server/AppWidgetServiceImpl.java
index d0dd9cf..daa82f2 100644
--- a/services/java/com/android/server/AppWidgetServiceImpl.java
+++ b/services/java/com/android/server/AppWidgetServiceImpl.java
@@ -599,7 +599,7 @@
     }
 
     public void bindAppWidgetId(int appWidgetId, ComponentName provider, Bundle options) {
-        mContext.enforceCallingPermission(android.Manifest.permission.BIND_APPWIDGET,
+        mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BIND_APPWIDGET,
             "bindAppWidgetId appWidgetId=" + appWidgetId + " provider=" + provider);
         bindAppWidgetIdImpl(appWidgetId, provider, options);
     }
@@ -607,7 +607,7 @@
     public boolean bindAppWidgetIdIfAllowed(
             String packageName, int appWidgetId, ComponentName provider, Bundle options) {
         try {
-            mContext.enforceCallingPermission(android.Manifest.permission.BIND_APPWIDGET, null);
+            mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BIND_APPWIDGET, null);
         } catch (SecurityException se) {
             if (!callerHasBindAppWidgetPermission(packageName)) {
                 return false;