Flutter 3.13.2 update

Flutter 3.13.2 update

-README update

-workspace-automation configs
 * _global.json - move to 3.13.2
 * _repos.json - remove wonderous, update commits, add depot_tools
 * flutter-engine.json - flutter engine local build (optional)
 * desktop-auto.json - remove clang from desktop-auto config

-flutter-engine recipe
 * remove bbappend patches

-flutter-auto
 * update agl-shell PACKAGECONFIG addition
 * remove patches
   upstream picked up 0001-shell-wayland-display-Handle-flags-as-bitfield-entri.patch
   dropped 0001-Add-optional-agl_shell-plugin.patch

Bug-AGL: SPEC-4936

Signed-off-by: Joel Winarske <joel.winarske@gmail.com>
Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Change-Id: Iddd7c0f735abb4d114ba89a8bf0e49977b469150