Tighten native API surface.

AsynchronousCloseMonitor is moved into libandroidio by
r.android.com/910073 and so libjavacore no longer needs to
be linked to the conscrypt namespace.

Bug: 123744297
Test: m && flashall
Test: atest CtsLibcoreOkHttpTestCases
Test: atest CtsLibcoreTestCases
Change-Id: Ic7500f57a854055c1a63f33b843234ce5792445a
diff --git a/build/apex/Android.bp b/build/apex/Android.bp
index a07b5a0..0ff1cbd 100644
--- a/build/apex/Android.bp
+++ b/build/apex/Android.bp
@@ -118,6 +118,7 @@
 // Native libraries that support the core Java libraries.
 libcore_native_shared_libs = [
     "libandroidicu",
+    "libandroidio",
     "libexpat",
     "libicui18n",
     "libicuuc",