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
3 files changed