Add public API for SSLEngines and SSLSockets

Bug: 110403421
Test: cts -m CtsLibcoreTestCases -t android.net.ssl
Change-Id: If7982975ed125d0e4a1ab6e79afbe0835b8807c4
diff --git a/README.android b/README.android
new file mode 100644
index 0000000..f20bc2a
--- /dev/null
+++ b/README.android
@@ -0,0 +1,11 @@
+Conscrypt in Android is made up of the contents of the Conscrypt
+GitHub repo (https://github.com/google/conscrypt) plus some
+Android-specific additions.  Specifically, the following are
+Android-only:
+
+Android.bp
+OWNERS
+README.android
+publicapi/...
+repackaged/...
+srcgen/...