Enable Async MTE in android-clat.

This change enables Async mode ARM MTE in clatd on compatible
hardware and has no effect otherwise.

Bug: 181603044
Test: atest under external/android-clat
Change-Id: Ib3c23381e2c7ef84499b26672347468b30c6209a
diff --git a/Android.bp b/Android.bp
index 4eda2ad..bdddd7a 100644
--- a/Android.bp
+++ b/Android.bp
@@ -90,6 +90,9 @@
     init_rc: [
         "vendor-464xlat.rc",
     ],
+    sanitize: {
+        memtag_heap: true,
+    },
 }
 
 // Unit tests.