Change libvixl symbol visibility. am: 07f3653da4 am: 6d0be08f95 am: 4632b10c27

Original change: https://android-review.googlesource.com/c/platform/external/vixl/+/1697237

Change-Id: I593c20dde4d5893a17e13f42a3f432d54ffcd909
diff --git a/Android.bp b/Android.bp
index 3e714a9..23dd084 100644
--- a/Android.bp
+++ b/Android.bp
@@ -188,6 +188,17 @@
         "com.android.art",
         "com.android.art.debug",
     ],
+
+    static: {
+        cflags: [
+            "-fvisibility=hidden",
+        ],
+    },
+    shared: {
+        cflags: [
+            "-fvisibility=protected",
+        ],
+    },
 }
 
 art_cc_library {