workaround for tether icon issue, until a proper fix is found

overlay/frameworks/base/core/res/res/values/config.xml

@@ -79,14 +79,12 @@
          USB interfaces.  If the device doesn't want to support tething over USB this should
          be empty.  An example would be "usb.*" -->
     <string-array translatable="false" name="config_tether_usb_regexs">
-        <item>usb\\d</item>
     </string-array>
 
     <!-- List of regexpressions describing the interface (if any) that represent tetherable
          Wifi interfaces.  If the device doesn't want to support tethering over Wifi this
          should be empty.  An example would be "softap.*" -->
     <string-array translatable="false" name="config_tether_wifi_regexs">
-        <item>tiwlan\\d</item>
     </string-array>
 
     <!-- Dhcp range (min, max) to use for tethering purposes -->
@@ -96,8 +94,6 @@
     <!-- Regex array of allowable upstream ifaces for tethering - for example if you want
          tethering on a new interface called "foo2" add <item>"foo\\d"</item> to the array -->
     <string-array translatable="false" name="config_tether_upstream_regexs">
-        <item>ppp\\d</item>
-        <item>tiwlan\\d</item>
     </string-array>
 
     <!-- Boolean indicating if we require the use of DUN on mobile for tethering.