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: Ia9d00bb0bb2fd40a360b3a13bcfb06539e50a840
diff --git a/overlay/frameworks/base/core/res/res/values/config.xml b/overlay/frameworks/base/core/res/res/values/config.xml
index 8712dd1..1a3c4cb 100755
--- a/overlay/frameworks/base/core/res/res/values/config.xml
+++ b/overlay/frameworks/base/core/res/res/values/config.xml
@@ -292,6 +292,10 @@
     <!-- Flag specifying whether WFC over IMS is availasble 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>
     <!-- Configure mobile tcp buffer sizes in the form:
          If no value is found for the rat-name in use, the system default will be applied.