msm8953-common: Use tether automatic upstream selection

(config_tether_upstream_automatic=true)

Test: as follows
    - built, flashed, booted
Bug: 32163131
Bug: 62648872
Bug: 63282480
Bug: 110118584
Bug: 110260419

Change-Id: I604cda53d6d37a33de3e3ccc65c0da781d21278b

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

@@ -147,16 +147,10 @@
         <item>bt-pan</item>
     </string-array>
 
-    <!-- Array of ConnectivityManager.TYPE_xxxx values allowable for tethering -->
-    <!-- Common options are [1, 4] for TYPE_WIFI and TYPE_MOBILE_DUN or
-    <!== [0,1,5,7] for TYPE_MOBILE, TYPE_WIFI, TYPE_MOBILE_HIPRI and TYPE_BLUETOOTH -->
-    <integer-array translatable="false" name="config_tether_upstream_types">
-        <item>1</item>
-        <item>0</item>
-        <item>4</item>
-        <item>5</item>
-        <item>7</item>
-    </integer-array>
+    <!-- When true, the tethering upstream network follows the current default
+         Internet network (except when the current default network is mobile,
+         in which case a DUN network will be used if required). -->
+    <bool translatable="false" name="config_tether_upstream_automatic">true</bool>
 
     <!-- Boolean indicating if restoring network selection should be skipped -->
     <!-- The restoring is handled by modem if it is true-->