policy_hal: Initial commit for target specific audio policy

- Derive target specific audio policy manager from the base class.
- Allow selection of USB analog dock headset device for voice calls.

Change-Id: I351e88a6abe02e56a14b4eef4c04862e79c5777c
diff --git a/policy_hal/Android.mk b/policy_hal/Android.mk
new file mode 100644
index 0000000..127b732
--- /dev/null
+++ b/policy_hal/Android.mk
@@ -0,0 +1,25 @@
+ifeq ($(strip $(BOARD_USES_ALSA_AUDIO)),true)
+
+LOCAL_PATH := $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := AudioPolicyManager.cpp
+
+LOCAL_SHARED_LIBRARIES := \
+    libcutils \
+    libutils \
+    liblog
+
+LOCAL_STATIC_LIBRARIES := \
+    libmedia_helper
+
+LOCAL_WHOLE_STATIC_LIBRARIES := \
+    libaudiopolicy_legacy
+
+LOCAL_MODULE := audio_policy.$(TARGET_BOARD_PLATFORM)
+LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw
+LOCAL_MODULE_TAGS := optional
+
+include $(BUILD_SHARED_LIBRARY)
+
+endif