Revert "Merging ub-launcher3-master, build 5938524"

This reverts commit 7cb721fa81.

Reason for revert: <INSERT REASONING HERE>

Change-Id: I10ebd177cc98be896282147df481b05f28241758

src_plugins/com/android/systemui/plugins/CustomWidgetPlugin.java

@@ -29,11 +29,28 @@ public interface CustomWidgetPlugin extends Plugin {
     String ACTION = "com.android.systemui.action.PLUGIN_CUSTOM_WIDGET";
     int VERSION = 1;
 
+    /**
+     * An unique identifier for this widget. Must be a non-negative integer.
+     */
+    int getProviderId();
+
     /**
      * The label to display to the user in the AppWidget picker.
      */
     String getLabel();
 
+    /**
+     * A preview of what the AppWidget will look like after it's configured.
+     * If not supplied, the AppWidget's icon will be used.
+     */
+    int getPreviewImage();
+
+    /**
+     * The icon to display for this AppWidget in the AppWidget picker. If not supplied in the
+     * xml, the application icon will be used.
+     */
+    int getIcon();
+
     /**
      * The default width of the widget when added to a host, in dp. The widget will get
      * at least this width, and will often be given more, depending on the host.