hal: acquire wake lock for voice call

acquire wake lock to fix voice mute during
usb disconnect.

Change-Id: I5d6c20e526fd49c9c88419c0466e486a4aa6c0fd
diff --git a/hal/Android.mk b/hal/Android.mk
index de04e52..787a317 100644
--- a/hal/Android.mk
+++ b/hal/Android.mk
@@ -111,7 +111,9 @@
 
 LOCAL_CFLAGS += -Wno-macro-redefined
 
-LOCAL_HEADER_LIBRARIES := libhardware_headers
+LOCAL_HEADER_LIBRARIES := \
+    libhardware_headers \
+    libhardware_legacy_headers
 
 LOCAL_SRC_FILES := \
     audio_hw.c \
@@ -145,7 +147,8 @@
     libhidlbase \
     libhidltransport \
     libprocessgroup \
-    libutils
+    libutils \
+    libhardware_legacy
 
 LOCAL_C_INCLUDES += \
     external/tinyalsa/include \
@@ -153,6 +156,7 @@
     system/media/audio_utils/include \
     external/expat/lib \
     vendor/qcom/opensource/core-utils/fwk-detect \
+    $(TOP)/hardware/libhardware_legacy/include/hardware_legacy \
     $(call include-path-for, audio-route) \
     $(call include-path-for, audio-effects) \
     $(LOCAL_PATH)/$(AUDIO_PLATFORM) \