getContainerProxy() Defines a pass-through insulation layer to ensure that lower-level binders cannot
downcast the ContainerAPI to the real BinderWrapper and gain additional
privileges.
Defines a pass-through insulation layer to ensure that lower-level binders cannot
downcast the ContainerAPI to the real BinderWrapper and gain additional
privileges. The default is to implement it as a not-very secure return
of the BinderWrapper itself.