[IntentHandling] Convert ARC intent filter action and mime types.

This CL converts the ARC intent filter action and mime types in to app
service intent filter struct. The match intent with intent filter logic
and intent filter overlap logic for preferred apps will not work fully
anymore, so the conversion is put behind a flag to avoid breaking
current intent picker feature.

BUG=1092784

Change-Id: I9d81fdf10b4be3f74ef8648514feb12283231880
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2237544
Commit-Queue: Maggie Cai <[email protected]>
Reviewed-by: Dominick Ng <[email protected]>
Cr-Commit-Position: refs/heads/master@{#777665}
diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index 8a9a88a..2ca6afb 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -2202,6 +2202,9 @@
 extern const char kImeServiceSandboxName[];
 extern const char kImeServiceSandboxDescription[];
 
+extern const char kIntentHandlingSharingName[];
+extern const char kIntentHandlingSharingDescription[];
+
 extern const char kIntentPickerPWAPersistenceName[];
 extern const char kIntentPickerPWAPersistenceDescription[];