Manual selection item's data icon is wrong

If level is the same previous level, the icon didn't updated.

Bug: 162505961
Test: fake the list and check item's icon. PASS
Change-Id: I6c40bfb40fe0d1c5d576b8cc0bc5190d9ab3ef04
diff --git a/src/com/android/settings/network/telephony/NetworkOperatorPreference.java b/src/com/android/settings/network/telephony/NetworkOperatorPreference.java
index 0a9c9b9..cfd587a 100644
--- a/src/com/android/settings/network/telephony/NetworkOperatorPreference.java
+++ b/src/com/android/settings/network/telephony/NetworkOperatorPreference.java
@@ -126,10 +126,8 @@
         final CellSignalStrength signalStrength = getCellSignalStrength(mCellInfo);
         final int level = signalStrength != null ? signalStrength.getLevel() : LEVEL_NONE;
         if (DBG) Log.d(TAG, "refresh level: " + String.valueOf(level));
-        if (mLevel != level) {
-            mLevel = level;
-            updateIcon(mLevel);
-        }
+        mLevel = level;
+        updateIcon(mLevel);
     }
 
     /**