fix missing headers

Bug: 33241851
Test: cd system/media && mma -j64 -k BOARD_VNDK_VERSION=current
Change-Id: I7c6e4b271b365f50c376af2925d0f8cbe8e58551
diff --git a/alsa_utils/Android.bp b/alsa_utils/Android.bp
index 247419f..db6beb1 100644
--- a/alsa_utils/Android.bp
+++ b/alsa_utils/Android.bp
@@ -22,6 +22,12 @@
         "alsa_format.c",
     ],
     export_include_dirs: ["include"],
+    header_libs: [
+        "libaudio_system_headers",
+    ],
+    export_header_lib_headers: [
+        "libaudio_system_headers",
+    ],
     shared_libs: [
         "liblog",
         "libcutils",