SoftAp: Add support to configure acsShouldExcludeDfs.

This change is to make acsShouldExcludeDfs parameter configurable
using "config_wifi_softap_acs_include_dfs".

Bug: 156571063
Test: atest com.android.server.wifi.HostapdHalTest
Test: Manual - Connect STA in DFS channel and turn on SoftAp
      and verify that SoftAp does't come up in DFS channel.
Change-Id: I33b527f95699e706901fe5e2d57e7dac92948ab0
diff --git a/service/res/values/config.xml b/service/res/values/config.xml
index 5d8a47c..635b3ad 100644
--- a/service/res/values/config.xml
+++ b/service/res/values/config.xml
@@ -414,4 +414,7 @@
     <integer translatable="false" name="config_wifiMaxNativeFailureSelfRecoveryPerHour">2</integer>
     <!-- Ignore the open saved network if from carrier provisioning app, there is a same open suggestion and a secure suggestion from same carrier available -->
     <bool translatable="false" name="config_wifiIgnoreOpenSavedNetworkWhenSecureSuggestionAvailable">true</bool>
+
+    <!-- Wifi driver Automatic channel selection (ACS) for softap to include DFS channels -->
+    <bool translatable="false" name="config_wifiSoftapAcsIncludeDfs">false</bool>
 </resources>