Call CBS dump in dumpsys

Bug: 187447232
Test: dumpsys isms
Change-Id: Ib18c6b411c9430155336b1e8b35f796a09ba429e

telephony/java/android/telephony/CellBroadcastService.java

@@ -28,6 +28,11 @@ import android.os.IBinder;
 import android.os.RemoteCallback;
 import android.telephony.cdma.CdmaSmsCbProgramData;
 
+import com.android.internal.util.FastPrintWriter;
+
+import java.io.FileDescriptor;
+import java.io.FileOutputStream;
+import java.io.PrintWriter;
 import java.util.List;
 import java.util.function.Consumer;
 
@@ -186,5 +191,16 @@ public abstract class CellBroadcastService extends Service {
         public @NonNull CharSequence getCellBroadcastAreaInfo(int slotIndex) {
             return CellBroadcastService.this.getCellBroadcastAreaInfo(slotIndex);
         }
+
+        @Override
+        protected void dump(FileDescriptor fd, PrintWriter fout, String[] args) {
+            CellBroadcastService.this.dump(fd, fout, args);
+        }
+
+        @Override
+        public void dump(FileDescriptor fd, String[] args) {
+            PrintWriter pw = new FastPrintWriter(new FileOutputStream(fd));
+            CellBroadcastService.this.dump(fd, pw, args);
+        }
     }
 }