SurfaceView: Release SurfacePackage when done

We release the SurfaceControl assosciated with a Surface package
when accepting a new SurfacePackage, or at time of detached-from-window
this way we don't rely on the finalize method.

Bug: 149591513
Test: Existing tests pass
Change-Id: Ic0f7259394836ee094ed49db73b5986b778b450f