Revert "Audio V4: Split system and vendor Audio.h"

This reverts commit fc9e212f018ce41430ec8dcebc3cae3c346474bb.

Reason for revert: Breaks multiple devices

Change-Id: I816671fd92246f85c97d00819858a74e36e2929d
diff --git a/modules/audio/Android.bp b/modules/audio/Android.bp
index 7929c66..a7467c2 100644
--- a/modules/audio/Android.bp
+++ b/modules/audio/Android.bp
@@ -23,10 +23,7 @@
     relative_install_path: "hw",
     proprietary: true,
     srcs: ["audio_hw.c"],
-    header_libs: [
-        "libhardware_headers",
-        "android.hardware.audio.common.legacy@2.0",
-    ],
+    header_libs: ["libhardware_headers"],
     shared_libs: [
         "liblog",
     ],
@@ -44,10 +41,21 @@
     relative_install_path: "hw",
     proprietary: true,
     srcs: ["audio_hw.c"],
-    header_libs: [
-        "libhardware_headers",
-        "android.hardware.audio.common.legacy@2.0",
+    header_libs: ["libhardware_headers"],
+    shared_libs: [
+        "liblog",
     ],
+    cflags: ["-Wall", "-Werror", "-Wno-unused-parameter"],
+}
+
+// The stub audio policy HAL module that can be used as a skeleton for
+// new implementations.
+cc_library_shared {
+    name: "audio_policy.stub",
+    relative_install_path: "hw",
+    proprietary: true,
+    srcs: ["audio_policy.c"],
+    header_libs: ["libhardware_headers"],
     shared_libs: [
         "liblog",
     ],