Revert "Fixs user input nothing, but save it successfully"

This reverts commit 6f27b8bca7.

Reason for revert: wrong logic

Change-Id: Ic2eaaa5dd318a2eb92da1a3615590e7d132641a7

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

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