audiopolicy: add log to print XML policy config flag

Add a log message to print the value of the flag that
enables XML based audio policy configuration. This will
help in determining the actual policy configuration file
being loaded (whether XML or text based legacy config file).

Change-Id: I476cc16e89438709bdd6ceea371eed6bdb7b62f4
diff --git a/policy_hal/AudioPolicyManager.cpp b/policy_hal/AudioPolicyManager.cpp
index 4c15fda..a5e0978 100644
--- a/policy_hal/AudioPolicyManager.cpp
+++ b/policy_hal/AudioPolicyManager.cpp
@@ -2107,6 +2107,12 @@
       mFMIsActive(false)
 {
 
+#ifdef USE_XML_AUDIO_POLICY_CONF
+    ALOGD("USE_XML_AUDIO_POLICY_CONF is TRUE");
+#else
+    ALOGD("USE_XML_AUDIO_POLICY_CONF is FALSE");
+#endif
+
     //TODO: Check the new logic to parse policy conf and update the below code
     //      Need this when SSR encoding is enabled
     char ssr_enabled[PROPERTY_VALUE_MAX] = {0};