Change soong parameter name disabled -> enabled

Change-Id: I7ef4f18c4e1d539708c0847c0b0337150148b662
diff --git a/Android.bp b/Android.bp
index c983a54..39fec89 100644
--- a/Android.bp
+++ b/Android.bp
@@ -51,10 +51,10 @@
     cppflags: LIBUNWIND_CPPFLAGS,
     stl: "none",
     sanitize: ["never"],
-    disabled: true,
+    enabled: false,
     arch: {
         arm: {
-            disabled: false,
+            enabled: true,
         },
     },
 }