Hide quota APIs until finalized.

Bug: 5383656
Change-Id: Ia2a978a6ff2ee642b0ea4d7d6b8857b7efffd612
diff --git a/core/java/android/net/NetworkQuotaInfo.java b/core/java/android/net/NetworkQuotaInfo.java
index b85f925..6535256 100644
--- a/core/java/android/net/NetworkQuotaInfo.java
+++ b/core/java/android/net/NetworkQuotaInfo.java
@@ -21,6 +21,8 @@
 
 /**
  * Information about quota status on a specific network.
+ *
+ * @hide
  */
 public class NetworkQuotaInfo implements Parcelable {
     private final long mEstimatedBytes;