Architecture review of Copyable Slice

Design doc: https://drive.google.com/open?id=1NJPd_282H4195HUGJH5cGJO_Jrcz1Vl6AAw_VQOtGq0

Fixes: 	118398321
Test: manual
Test: make RunSettingsRoboTests -j ROBOTEST_FILTER=com.android.settings.slice

Change-Id: Ic6762e58698a994d16a5de1778b4035ae430a256

src/com/android/settings/slices/SettingsSliceProvider.java

@@ -106,6 +106,12 @@ public class SettingsSliceProvider extends SliceProvider {
     public static final String ACTION_SLIDER_CHANGED =
             "com.android.settings.slice.action.SLIDER_CHANGED";
 
+    /**
+     * Action passed for copy data for the Copyable Slices.
+     */
+    public static final String ACTION_COPY =
+            "com.android.settings.slice.action.COPY";
+
     /**
      * Intent Extra passed for the key identifying the Setting Slice.
      */
@@ -509,4 +515,4 @@ public class SettingsSliceProvider extends SliceProvider {
         }
         return new String[0];
     }
-}
+}