[MagicStack] Allow to remove single tab module.

In this CL:
1) Remove ModuleConfigChecker#isConfigurable(), make single tab card
   is configurable.
2) Update string in customize settings: single tab and tab resumption
   modules are all controlled by the same key "Continue with this tab".
3) Update strings for context menu hide.
4) Add logic to hide both tab modules if any one is hidden by users.
5) Remove string:
   IDS_TAB_RESUMPTION_MODULE_OTHER_DEVICES_CONTEXT_MENU_HIDE
Screenshots of the strings:
https://docs.google.com/document/d/1E-FX8Rtl0s-8mO7QENGV6ivXMuFYv6g7DW2QXr8p_fQ/edit?tab=t.0
Demo: https://drive.google.com/file/d/1E1B7UagGP3hXIZGnFt0sGgD7HqjCRyxn/view?usp=drive_link

Bug: 41485537
Change-Id: I1070030176b134c9a5ea95aab45b62d56c1f57b5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5353920
Reviewed-by: Xinyi Ji <xinyiji@chromium.org>
Commit-Queue: Xi Han <hanxi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1270541}