Update "AndroidX.Window" to "1.0.0-rc01"

[conceptdev]

Current binding uses beta04 (released 11/17, bound in #428): https://developer.android.com/jetpack/androidx/releases/window#1.0.0-beta04

rc01 was released 12/15.

Packages affected:

• Xamarin.AndroidX.Window
• Xamarin.AndroidX.Window.WindowJava

There are no known breaking changes from beta04.

UPDATE: see PR #449

UPDATE: stable version of the underlying package was released on 1/26/22, see issue #470 for details

[conceptdev]

Superseded by #470 request to bind the 1.0.0 stable release - the RC01 binding will be skipped