audio: Fix flac offload not working

If AUDIO_FEATURE_ENABLED_FLAC_OFFLOAD rather
than AUDIO_FEATURE_ENABLED_EXTN_FLAC_OFFLOAD is true,
we should enable COMPRESS_METADATA_NEEDED also.

Change-Id: I0118e08e1bee46fe3baf0a1faa66f75fdb43e0d4
diff --git a/hal/Android.mk b/hal/Android.mk
index 88e0107..8e28458 100644
--- a/hal/Android.mk
+++ b/hal/Android.mk
@@ -219,6 +219,11 @@
 endif
 endif
 
+ifeq ($(strip $(AUDIO_FEATURE_ENABLED_FLAC_OFFLOAD)),true)
+    LOCAL_CFLAGS += -DFLAC_OFFLOAD_ENABLED
+    LOCAL_CFLAGS += -DCOMPRESS_METADATA_NEEDED
+endif
+
 ifeq ($(strip $(AUDIO_FEATURE_ENABLED_EXTN_FLAC_DECODER)),true)
     LOCAL_CFLAGS += -DFLAC_OFFLOAD_ENABLED
     LOCAL_CFLAGS += -DCOMPRESS_METADATA_NEEDED