Fix crash due to display name is not set to View.

Flag: EXEMPT bug fix
Fix: b/396700275
Fix: b/396606595
Test: manual test
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:04006ccb4867a17e7e59c64327d102e9b30af5f9)
Merged-In: I2a70c4e31c182f99cc4fb3da93ce7911da005429
Change-Id: I2a70c4e31c182f99cc4fb3da93ce7911da005429

src/com/android/settings/network/telephony/RenameMobileNetworkDialogFragment.java

@@ -165,6 +165,7 @@ public class RenameMobileNetworkDialogFragment extends InstrumentedDialogFragmen
         }
         final CharSequence displayName = SubscriptionUtil.getUniqueSubscriptionDisplayName(
                 info, getContext());
+        mNameView.setText(displayName);
         if (!TextUtils.isEmpty(displayName)) {
             mNameView.setSelection(Math.min(displayName.length(),
                     getResources().getInteger(R.integer.sim_label_max_length)));