Make libandroidio visible to externals/conscrypt

libjavacrypto(externals/conscrypt) dlopen()s libandroidio and this is
tracked by 'runtime_libs' prop in externals/conscrypt/Android.bp.

Bug: 144659031
Test: m
Change-Id: I7f8ff046293a4c47e01366e541d2161add37eb9f
diff --git a/NativeCode.bp b/NativeCode.bp
index a27fa74..ef2f554 100644
--- a/NativeCode.bp
+++ b/NativeCode.bp
@@ -88,6 +88,7 @@
     name: "libandroidio",
     visibility: [
         "//art/build/apex",
+        "//external/conscrypt",
     ],
     defaults: [
         "core_native_default_flags",