Update sanitize property format

Change-Id: I14d9ced1dd65ffe85ce1e8d3b7a68a6726c2ccf5

Android.bp

diff --git a/Android.bp b/Android.bp
index 39fec89..1c89df4 100644
--- a/Android.bp
+++ b/Android.bp
@@ -50,7 +50,9 @@
     local_include_dirs: LIBUNWIND_LOCAL_INCLUDES,
     cppflags: LIBUNWIND_CPPFLAGS,
     stl: "none",
-    sanitize: ["never"],
+    sanitize: {
+        never: true,
+    },
     enabled: false,
     arch: {
         arm: {