[Sharesheet] Add APP_STARTED_FROM_SHARESHEET user interaction type.

Currently there is no matching user interaction type for LaunchSource
kFromSharesheet, which causes the app cannot launch. Adds the user
interaction type to fix this.

BUG=1097623

Change-Id: I92f2ca0b34f379cdaffa7d9bf6dea3a7592bbaa5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2336009Reviewed-by: Dominick Ng <dominickn@chromium.org>
Reviewed-by: Shao-Chuan Lee <shaochuan@chromium.org>
Commit-Queue: Maggie Cai <mxcai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#794904}

chrome/browser/apps/app_service/arc_apps.cc

@@ -197,6 +197,10 @@ base::Optional<arc::UserInteractionType> GetUserInterationType(
       user_interaction_type =
           arc::UserInteractionType::APP_STARTED_FROM_OMNIBOX;
       break;
+    case apps::mojom::LaunchSource::kFromSharesheet:
+      user_interaction_type =
+          arc::UserInteractionType::APP_STARTED_FROM_SHARESHEET;
+      break;
     default:
       NOTREACHED();
       return base::nullopt;

components/arc/metrics/arc_metrics_constants.h

@@ -95,7 +95,10 @@ enum class UserInteractionType {
   // User started an app from entering URL in the Omnibox in the browser.
   APP_STARTED_FROM_OMNIBOX = 20,
 
-  kMaxValue = APP_STARTED_FROM_OMNIBOX,
+  // User started an app from Chrome OS sharesheet.
+  APP_STARTED_FROM_SHARESHEET = 21,
+
+  kMaxValue = APP_STARTED_FROM_SHARESHEET,
 };
 
 // Enumerates relevant Mojo connections.

tools/metrics/histograms/enums.xml

@@ -3399,6 +3399,7 @@ Unknown properties are collapsed to zero. -->
   <int value="18" label="App started from Kiosk Next Home"/>
   <int value="19" label="Interaction with gamepad"/>
   <int value="20" label="App started from URL in the Omnibox"/>
+  <int value="21" label="App started from sharesheet"/>
 </enum>
 
 <enum name="ArcVideoDecodeAcceleratorResult">