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: Icf36be19a8b6bd22cf2827e95d262020df5bdba0

Android.bp

@@ -412,6 +412,11 @@ cc_test {
     ],
     srcs: ["test/decoder/main.c"],
     static_libs: ["libhevcdec"],
+    target: {
+        darwin: {
+            enabled: false,
+        },
+    },
 }
 
 cc_library_static {

fuzzer/Android.bp

@@ -8,4 +8,9 @@ cc_fuzz {
         "libhevcdec",
         "liblog",
     ],
+    target: {
+        darwin: {
+            enabled: false,
+        },
+    },
 }