fixup: Removed immutable field from AgentAPI

Renumbered SubscriptionInfo fields.

agentapi/agentapi.proto

@@ -21,10 +21,10 @@ message SubscriptionInfo {
     string productId = 1;           // The ID of the Ubuntu Pro For Windows product on the Microsoft Store.
 
     oneof subscriptionType {
-        Empty none = 3;             // There is no active subscription.
-        Empty user = 4;             // The subscription is managed by the user with a pro token from the GUI or the registry.
-        Empty organization = 5;     // The subscription is managed by the sysadmin with a pro token from the registry.
-        Empty microsoftStore = 6;   // The subscription is managed via the Microsoft store.
+        Empty none = 2;             // There is no active subscription.
+        Empty user = 3;             // The subscription is managed by the user with a pro token from the GUI or the registry.
+        Empty organization = 4;     // The subscription is managed by the sysadmin with a pro token from the registry.
+        Empty microsoftStore = 5;   // The subscription is managed via the Microsoft store.
     };
 }