Improves DumpableContainer javadoc.

Test: n/a
Fixes: 220889663

Change-Id: I0d2fbd623d00ca44b5b2a84b7c6cc3b89edd4d63
diff --git a/core/java/android/util/DumpableContainer.java b/core/java/android/util/DumpableContainer.java
index e7b2acd..fef5acd 100644
--- a/core/java/android/util/DumpableContainer.java
+++ b/core/java/android/util/DumpableContainer.java
@@ -18,8 +18,7 @@
 import android.annotation.NonNull;
 
 /**
- * Objects that contains a list of {@link Dumpable}, which will be dumped when the object itself
- * is dumped.
+ * Represents a container that manages {@link Dumpable dumpables}.
  */
 public interface DumpableContainer {