Update subscriptions_changed_listener_thread as bugfix flag

Bug: 332451908
Test: flag rename only
Change-Id: If25984439cedcba15ae7d62d0b789eed3559b20c

location/java/android/location/flags/location.aconfig

@@ -80,10 +80,13 @@ flag {
 }
 
 flag {
-    name: "subscriptions_listener_thread"
+    name: "subscriptions_changed_listener_thread"
     namespace: "location"
-    description: "Flag for running onSubscriptionsChangeListener on FgThread"
+    description: "Flag for running onSubscriptionsChangedListener on FgThread"
     bug: "332451908"
+    metadata {
+        purpose: PURPOSE_BUGFIX
+    }
 }
 
 flag {

services/core/java/com/android/server/location/gnss/GnssNetworkConnectivityHandler.java

@@ -203,7 +203,7 @@ class GnssNetworkConnectivityHandler {
 
         SubscriptionManager subManager = mContext.getSystemService(SubscriptionManager.class);
         if (subManager != null) {
-            if (Flags.subscriptionsListenerThread()) {
+            if (Flags.subscriptionsChangedListenerThread()) {
                 subManager.addOnSubscriptionsChangedListener(FgThread.getExecutor(),
                         mOnSubscriptionsChangeListener);
             } else {