Update makefiles (2/2).

Test: pass
Change-Id: Ic7e6289c7b69785491708ce0acbb657f4c704229
diff --git a/audio/effect/2.0/Android.bp b/audio/effect/2.0/Android.bp
index 937a4e6..fea2a33 100644
--- a/audio/effect/2.0/Android.bp
+++ b/audio/effect/2.0/Android.bp
@@ -135,6 +135,7 @@
     generated_sources: ["android.hardware.audio.effect@2.0_genc++"],
     generated_headers: ["android.hardware.audio.effect@2.0_genc++_headers"],
     export_generated_headers: ["android.hardware.audio.effect@2.0_genc++_headers"],
+    vendor_available: true,
     shared_libs: [
         "libhidlbase",
         "libhidltransport",