Build audio.primary.default, audio.stub.default, audio_policy.stub with BOARD_VNDK_VERSION

Bug: 37342627
Test: BOARD_VNDK_VERSION=current m -j64 audio.primary.default.vendor
Test: BOARD_VNDK_VERSION=current m -j64 audio.stub.default.vendor
Test: BOARD_VNDK_VERSION=current m -j64 audio_policy.stub.vendor
Change-Id: If3a8668429e20e75fc43aefe3b5a56ff0efc7135
Merged-In: If3a8668429e20e75fc43aefe3b5a56ff0efc7135
diff --git a/modules/audio/Android.bp b/modules/audio/Android.bp
index 84daead..a7467c2 100644
--- a/modules/audio/Android.bp
+++ b/modules/audio/Android.bp
@@ -23,6 +23,7 @@
     relative_install_path: "hw",
     proprietary: true,
     srcs: ["audio_hw.c"],
+    header_libs: ["libhardware_headers"],
     shared_libs: [
         "liblog",
     ],
@@ -40,6 +41,7 @@
     relative_install_path: "hw",
     proprietary: true,
     srcs: ["audio_hw.c"],
+    header_libs: ["libhardware_headers"],
     shared_libs: [
         "liblog",
     ],
@@ -53,6 +55,7 @@
     relative_install_path: "hw",
     proprietary: true,
     srcs: ["audio_policy.c"],
+    header_libs: ["libhardware_headers"],
     shared_libs: [
         "liblog",
     ],