Add more functionality to channel groups

Description, blocking, links to/from the app

Test: cts, runtest systemui-notification
Bug: 63927402
Change-Id: Icc8caf319651f9ac2d622fb54110270c89bdff61
diff --git a/services/core/java/com/android/server/notification/RankingConfig.java b/services/core/java/com/android/server/notification/RankingConfig.java
index 36da04d..b5ef1c6 100644
--- a/services/core/java/com/android/server/notification/RankingConfig.java
+++ b/services/core/java/com/android/server/notification/RankingConfig.java
@@ -29,6 +29,7 @@
     void setShowBadge(String packageName, int uid, boolean showBadge);
     boolean canShowBadge(String packageName, int uid);
     boolean badgingEnabled(UserHandle userHandle);
+    boolean isGroupBlocked(String packageName, int uid, String groupId);
 
     Collection<NotificationChannelGroup> getNotificationChannelGroups(String pkg,
             int uid);