Ensure device does not use "allow hold" carrier config option.

This device predates the introduction of the "allow_hold_in_ims_call"
carrier config option, and it is undesirable to take away the functionality
associated with that carrier config valeu.  Setting this to "false" here
ensures that future releases for the device retains existing functionality.

Bug: 30449352
Change-Id: If26ecf9e7e5016ef6dee87686584816eff977d04
diff --git a/overlay/frameworks/base/core/res/res/values/config.xml b/overlay/frameworks/base/core/res/res/values/config.xml
index 55df31c..ecece92 100644
--- a/overlay/frameworks/base/core/res/res/values/config.xml
+++ b/overlay/frameworks/base/core/res/res/values/config.xml
@@ -339,6 +339,10 @@
     <!-- Flag specifying whether WFC over IMS is available on device -->
     <bool name="config_device_wfc_ims_available">true</bool>
 
+    <!-- Flag specifying that this device will NOT use the "allow_hold_in_ims_call" carrier config
+         option. -->
+    <bool name="config_device_respects_hold_carrier_config">false</bool>
+
     <!-- Values for GPS configuration -->
     <string-array translatable="false" name="config_gpsParameters">
         <item>SUPL_HOST=supl.google.com</item>