Capture links in window decoration

This CL does the following:
1. Adds a capturedLink and capturedLinkTimestamp field into TaskInfo.
2. On TaskInfo#fillTaskInfo, iterates activities top to bottom and finds
   the first activity (if any exist) which was opened using a link.
3. If TaskInfo#capturedLink is not null and has not been previously
   saved, saves the link and posts a runnable to clear the link after a
   set amount of time.
4. Creates an "Open in browser" button in the handle menu if the
   capturedLink field in TaskInfo is not null.
4. When the window decoration is created, finds and saves the component
   name of the default browser.
5. When a click event is received, opens the saved link in the default
   browser.

Bug: 349695493
Test: Open slides from gmail app and use button to switch to browser
Flag: com.android.window.flags.enable_desktop_windowing_app_to_web

Change-Id: I8e638cde8c1fff4c5f2b75da2d9b31541dbe2489