media_ndk_headers: Add host support

Test: Build media_ndk_headers on host
Bug: 151789258

Change-Id: Ia68e5c7bdb114015b9e16b4106e3343b6aaae876
diff --git a/media/ndk/Android.bp b/media/ndk/Android.bp
index ce91249..4b60475 100644
--- a/media/ndk/Android.bp
+++ b/media/ndk/Android.bp
@@ -35,7 +35,13 @@
 cc_library_headers {
     name: "media_ndk_headers",
     vendor_available: true,
-    export_include_dirs: ["include"]
+    export_include_dirs: ["include"],
+    host_supported: true,
+    target: {
+        darwin: {
+            enabled: false,
+        },
+    },
 }
 
 cc_library_shared {