[7/N] WindowDecor refactor: Create App-to-Web repository

App-to-web info (i.e. captured link, generic link) needs to be shared
across multiple controllers. Creating a repo allows us to do this and
prevents us from needing to duplicate the logic.

Bug: 409648813
Flag: com.android.window.flags.enable_window_decoration_refactor
Test: m
Change-Id: I4c3341a102d9f9b21e2f759f67a3f2e867c90b69