configs: Rb3Gen2: enable support for stt meta test app

- enable flag to support stt meta app

Change-Id: I1cfe91e7997188056aebffb38cfe6df1fb3d9833
diff --git a/configs/lahaina/lahaina.mk b/configs/lahaina/lahaina.mk
index 8882d5d..485f351 100644
--- a/configs/lahaina/lahaina.mk
+++ b/configs/lahaina/lahaina.mk
@@ -579,3 +579,6 @@
 endif
 
 AUDIO_FEATURE_ENABLED_GKI := true
+
+#enable STT support
+AUDIO_FEATURE_ENABLED_STT_SUPPORT := true