STA+STA: Add overlay for Make Before Break use case to allow it to be disabled

Bug: 160346062
Test: compiles
Change-Id: I79e328399df55a6a6f13e29f1a0404eb952307bb
diff --git a/service/res/values/config.xml b/service/res/values/config.xml
index ee64c56..8ec179c 100644
--- a/service/res/values/config.xml
+++ b/service/res/values/config.xml
@@ -477,4 +477,8 @@
 
     <!-- Enable adding minimum confirmation duration when sending network score to connectivity service. -->
     <bool translatable="false" name="config_wifiMinConfirmationDurationSendNetworkScoreEnabled">false</bool>
+
+    <!-- Enable Make-Before-Break Wifi network switching.
+         Note: this is conditional on the device supporting dual concurrent STAs. -->
+    <bool translatable="false" name="config_wifiMultiStaNetworkSwitchingMakeBeforeBreakEnabled">false</bool>
 </resources>
diff --git a/service/res/values/overlayable.xml b/service/res/values/overlayable.xml
index a51d7ca..b64c7ca 100644
--- a/service/res/values/overlayable.xml
+++ b/service/res/values/overlayable.xml
@@ -150,6 +150,7 @@
           <item type="integer" name="config_wifiStationaryPnoScanIntervalMillis" />
           <item type="integer" name="config_wifiDelayDisconnectOnImsLostMs" />
           <item type="bool" name="config_wifiMinConfirmationDurationSendNetworkScoreEnabled" />
+          <item type="bool" name="config_wifiMultiStaNetworkSwitchingMakeBeforeBreakEnabled" />
           <!-- Params from config.xml that can be overlayed -->
 
           <!-- Params from strings.xml that can be overlayed -->