Add a constant representing a card update for the QuickAccessWallet.

Bug: 151742762
Test: atest CtsQuickAccessWalletTestCases
Change-Id: I944da80ee782c00f43299a0c4b01eef59b79e463
diff --git a/core/java/android/service/quickaccesswallet/WalletServiceEvent.java b/core/java/android/service/quickaccesswallet/WalletServiceEvent.java
index fb524be..5ee92da 100644
--- a/core/java/android/service/quickaccesswallet/WalletServiceEvent.java
+++ b/core/java/android/service/quickaccesswallet/WalletServiceEvent.java
@@ -40,10 +40,16 @@
     public static final int TYPE_NFC_PAYMENT_STARTED = 1;
 
     /**
+     * Indicates that the wallet cards have changed and should be refreshed.
+     * @hide
+     */
+    public static final int TYPE_WALLET_CARDS_UPDATED = 2;
+
+    /**
      * @hide
      */
     @Retention(RetentionPolicy.SOURCE)
-    @IntDef({TYPE_NFC_PAYMENT_STARTED})
+    @IntDef({TYPE_NFC_PAYMENT_STARTED, TYPE_WALLET_CARDS_UPDATED})
     public @interface EventType {
     }