Disable macOS build

There is no memalign on Darwin.
So disable the build for macOS till memalign is replaced with
an alternative.

Test: Review
Bug: 140696633
Change-Id: Ie3bf9ee178faa58f6c8495f6469d4702034feb79
diff --git a/fuzzer/Android.bp b/fuzzer/Android.bp
index d3772a4..4250ec5 100644
--- a/fuzzer/Android.bp
+++ b/fuzzer/Android.bp
@@ -8,4 +8,9 @@
         "libmpeg2dec",
         "liblog",
     ],
+    target: {
+        darwin: {
+            enabled: false,
+        },
+    },
 }
diff --git a/test/Android.bp b/test/Android.bp
index f95a947..b8325c3 100644
--- a/test/Android.bp
+++ b/test/Android.bp
@@ -13,4 +13,9 @@
     srcs: ["decoder/main.c"],
     static_libs: ["libmpeg2dec"],
     shared_libs: ["liblog"],
+    target: {
+        darwin: {
+            enabled: false,
+        },
+    },
 }