if do not turn on wifi STA or SAP, there is no 5GHz choice
 for SAP config

b/22008176

Change-Id: Id1020f975bce1ff7a3c738c4180f3d7686718d82
diff --git a/src/com/android/settings/wifi/WifiApDialog.java b/src/com/android/settings/wifi/WifiApDialog.java
index d30457b..b43a7ac 100644
--- a/src/com/android/settings/wifi/WifiApDialog.java
+++ b/src/com/android/settings/wifi/WifiApDialog.java
@@ -134,9 +134,10 @@
 
         ArrayAdapter <CharSequence> channelAdapter;
         String countryCode = mWifiManager.getCountryCode();
-        if (!mWifiManager.is5GHzBandSupported() || countryCode == null) {
+        if (!mWifiManager.isDualBandSupported() || countryCode == null) {
             //If no country code, 5GHz AP is forbidden
-            Log.i(TAG," NO country code, forbid 5GHz");
+            Log.i(TAG,(!mWifiManager.isDualBandSupported() ? "Device do not support 5GHz " :"") 
+                    + (countryCode == null ? " NO country code" :"") +  " forbid 5GHz");
             channelAdapter = ArrayAdapter.createFromResource(mContext,
                     R.array.wifi_ap_band_config_2G_only, android.R.layout.simple_spinner_item);
             mWifiConfig.apBand = 0;