hal: add audio feature flag for ssrec compilation

Add audio feature flag for ssrec library
compilation in audio extn.

Change-Id: Ifa36e523e70ab911d0e6fbd5a339179e34af1c9b
diff --git a/hal/audio_extn/Android.mk b/hal/audio_extn/Android.mk
index ccc1b2e..3508015 100644
--- a/hal/audio_extn/Android.mk
+++ b/hal/audio_extn/Android.mk
@@ -114,6 +114,7 @@
 #-------------------------------------------
 #            Build SSREC LIB
 #-------------------------------------------
+ifeq ($(strip $(AUDIO_FEATURE_ENABLED_SSR)),true)
 include $(CLEAR_VARS)
 
 LOCAL_MODULE := libssrec
@@ -170,7 +171,7 @@
 LOCAL_HEADER_LIBRARIES += libhardware_headers
 LOCAL_HEADER_LIBRARIES += libsystem_headers
 include $(BUILD_SHARED_LIBRARY)
-
+endif
 #--------------------------------------------
 #          Build HDMI_EDID LIB
 #--------------------------------------------