All Parcelable CREATOR fields are @NonNull.

If they were null, then the Parcelable would fail to work.

Bug: 126726802
Test: manual
Change-Id: I7929ffa2f20e5de1c8e68e8263cca99496e9d014
Exempt-From-Owner-Approval: Trivial API annotations
diff --git a/telecomm/java/android/telecom/GatewayInfo.java b/telecomm/java/android/telecom/GatewayInfo.java
index 928570e..0faa4fd 100644
--- a/telecomm/java/android/telecom/GatewayInfo.java
+++ b/telecomm/java/android/telecom/GatewayInfo.java
@@ -80,7 +80,7 @@
     /**
      * The Parcelable interface.
      * */
-    public static final Parcelable.Creator<GatewayInfo> CREATOR =
+    public static final @android.annotation.NonNull Parcelable.Creator<GatewayInfo> CREATOR =
             new Parcelable.Creator<GatewayInfo> () {
 
         @Override