Fixs user input nothing, but save it successfully

- If user inputs nothing, do nothing for this action.

fix: 333642116
Test: Manual test
Change-Id: I66213f5d5c47d2b85d3849c95e7cf076e249420e

src/com/android/settings/network/SimOnboardingService.kt

@@ -225,7 +225,7 @@ class SimOnboardingService {
     }
 
     fun addItemForRenaming(subInfo: SubscriptionInfo, newName: String) {
-        if (subInfo.displayName == newName) {
+        if (newName.isEmpty() && subInfo.displayName == newName) {
             return
         }
         renameMutableMap[subInfo.subscriptionId] = newName