Make jni_headers more widely available

It's another part of aosp/1276318 to make the jni_headers visible
for modules(e.g. Connectivity module) to fix the code sync issue
between mainline-prod and aosp-master.

Bug: 152482542
Bug: 174281883
Test: m
Change-Id: Ica0fdd9984987359be4087d7b33a226b54a90193
Merged-In: Ifc29bd154022c7f9a4527226e856be72e58e5dfc
diff --git a/Android.bp b/Android.bp
index 10c0ff6..223279a 100644
--- a/Android.bp
+++ b/Android.bp
@@ -23,6 +23,11 @@
             enabled: true,
         },
     },
+    apex_available: [
+            "//apex_available:platform",
+            "//apex_available:anyapex",
+    ],
+    visibility: ["//visibility:public"],
     // The minimum sdk version required by users of this module.
     sdk_version: "minimum",
     // As part of mainline modules(APEX), it should support at least 29(Q)