mash: Port ash_sysui app list presenter to mojo:ash.

chrome/app/mojo/chrome_manifest.json

 {
   "manifest_version": 1,
   "name": "exe:chrome",
   "display_name": "Chrome",
   "capabilities": {
     "required": {
       "*": { "classes": [ "app" ] },
       "mojo:ash": {
         "interfaces": [
           "ash::mojom::ShelfController",
           "ash::mojom::WallpaperController"
         ]
       },
       "mojo:touch_hud": {
         "interfaces": [
           "mash::mojom::Launchable"
         ]
       }
     },
-    "provided": {
-      "mash:launchable": [ "mash::mojom::Launchable" ],
-      "app_list:presenter": [ "app_list::mojom::AppListPresenter" ]

[mfomitchev, 2016/09/12 22:39:21]

It used to be that if one interface was declared as provided - all needed to be
declared as provided, or else the Shell would deny the connection. Has that
changed?

[msw, 2016/09/12 22:52:09]

I was never aware of that requirement, perhaps that was just for classes and not
interfaces? I'm removing this class (containing just a single interface) and
just listing the interface directly in mash's manifest; that works fine, afaict.

-    }
+    "provided": { "mash:launchable": [ "mash::mojom::Launchable" ] }
   }
 }