Utilize the AssistContent#getWebUri when available

Gets the assist content and, if the captured link is unavailable and
assist content contains a web uri, sets that as the browser link.

Bug: 349695493
Test: open in browser from docs
Flag: com.android.window.flags.enable_desktop_windowing_app_to_web

Change-Id: Id2cb79c95e1f6dff77ce7b66184b56e4264d85c5
6 files changed