Modify intent mojom to support the adaptive icon.

This is the preparing for CL:2305816. Add RawIconPngData to fetch the
foreground and background icon images.

BUG=1083331

Change-Id: I16112cebffc0296852c585c05b9047ce5926dcd4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2307010Reviewed-by: Dominick Ng <dominickn@chromium.org>
Commit-Queue: Nancy Wang <nancylingwang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#790654}

components/arc/mojom/intent_helper.mojom

@@ -2,10 +2,11 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
-// Next MinVersion: 40
+// Next MinVersion: 41
 
 module arc.mojom;
 
+import "components/arc/mojom/app.mojom";
 import "components/arc/mojom/bitmap.mojom";
 import "components/arc/mojom/camera_intent.mojom";
 import "components/arc/mojom/intent_common.mojom";
@@ -107,6 +108,7 @@ struct ActivityIcon {
   uint32 width;  // in px
   uint32 height;  // in px
   array<uint8> icon;  // in BGRA8888 format
+  [MinVersion=40] RawIconPngData? icon_png_data;
 };
 
 // URL associated with its mime type.