QMAA: Add support for HAL module disable

- Disable audio HAL modules compilation
  based on QMAA flag

Change-Id: I3ec8c82bfcf699a3bbf5e7133480a4bda1240a5a
diff --git a/hal/Android.mk b/hal/Android.mk
index 783c6aa..1ba715b 100644
--- a/hal/Android.mk
+++ b/hal/Android.mk
@@ -1,3 +1,4 @@
+ifneq ($(AUDIO_USE_STUB_HAL), true)
 ifeq ($(strip $(BOARD_USES_ALSA_AUDIO)),true)
 
 LOCAL_PATH := $(call my-dir)
@@ -471,3 +472,4 @@
 LOCAL_CFLAGS += -Wno-unused-local-typedef
 
 endif
+endif