Add SuggestionFeatureProvider interface.

The interface is added so that a vendor can add new suggestions to the
settings app, and customize details for these suggestions.

Test: make RunSettingsRoboTests

BUG: 34219298

Change-Id: I373c63709b1aaf68360aa2561a2ecfc3194e0e2b

src/com/android/settings/dashboard/SuggestionFeatureProvider.java

@@ -26,4 +26,10 @@ public interface SuggestionFeatureProvider {
      */
     boolean isSmartSuggestionEnabled(Context context);
 
+    /** Return true if className is the name of a class of one of your newly added suggestion. */
+    boolean isPresent(String className);
+
+    /** Return true if the suggestion has already been completed and does not need to be shown */
+    boolean isSuggestionCompleted(Context context);
+
 }