libaudiopreprocessing: Disable host build for mac

Bug: 182829696
Test: Review

Change-Id: I9335c56d2e69ec0e5399a22b935978d83e90473e
diff --git a/media/libeffects/preprocessing/Android.bp b/media/libeffects/preprocessing/Android.bp
index 37b2ae0..87ed8b6 100644
--- a/media/libeffects/preprocessing/Android.bp
+++ b/media/libeffects/preprocessing/Android.bp
@@ -48,4 +48,9 @@
         "libhardware_headers",
         "libwebrtc_absl_headers",
     ],
+    target: {
+        darwin: {
+            enabled: false,
+        },
+    },
 }