Unhide parts of SurfaceControl API in SDK.

In parity with the recently exposed NDK APIs. In addition removing @hide
we make a few changes to prepare the APIs for being public.
1. Use a hidden singleton SurfaceSession
2. Expose a Surface constructor for ANativeWindow inter-op
3. Mark SurfaceControl final
4. Implement setGeometry as public version of setPosition/matrix/crop.
5. Add a visibility toggle method (as opposed to show/hide methods) for
   parity with NDK.

Bug: 111297488
Test: android.view.cts.SurfaceControlTests
Change-Id: Iac043658a360a48086ef4701a6a8ba2396878e81