wifi: Add bridged pre-fix for tethering interface

In bridged mode, the tethered interface will include the prefix ap_br_

Bug: 162686273
Test: Manual Test - bridged AP enabled success
and client can connected it and get the IP address
Test: atest -c NetworkStackTests
Test: atest -c FrameworksNetTests
Test: atest -c CtsNetTestCasesLatestSdk
Change-Id: I89ae178c658a42f902199afaed89ec798de54643
diff --git a/Tethering/res/values/config.xml b/Tethering/res/values/config.xml
index 5f8d299..4391006 100644
--- a/Tethering/res/values/config.xml
+++ b/Tethering/res/values/config.xml
@@ -40,6 +40,8 @@
     <string-array translatable="false" name="config_tether_wifi_regexs">
         <item>"wlan\\d"</item>
         <item>"softap\\d"</item>
+        <item>"ap_br_wlan\\d"</item>
+        <item>"ap_br_softap\\d"</item>
     </string-array>
 
     <!-- List of regexpressions describing the interface (if any) that represent tetherable