Fixed extension's newtab is not loaded when it's restored during the startup

[simonhong]

fix brave/brave-browser#30890

As we sanitize serialzed navigation(#14603), encoded page state is empty for all chrome url.
So, new page state is created with virtual url when it's restored during the startup. ContentSerializedNavigationBuilder::ToNavigationEntry() set new page state if it's empty.
When new page state is created, navigation's virtual url is created.
If url is re-written when NavigationEntryImpl is created, that re-written url is ignored.
To fix this, including url info only for chrome url's encoded page state.

Resolves

Submitter Checklist:

• I confirm that no security/privacy review is needed, or that I have requested one
• There is a ticket for my issue
• Used Github auto-closing keywords in the PR description above
• Wrote a good PR/commit description
• Squashed any review feedback or "fixup" commits before merge, so that history is a record of what happened in the repo, not your PR
• Added appropriate labels (QA/Yes or QA/No; release-notes/include or release-notes/exclude; OS/...) to the associated issue
• Checked the PR locally:
  • npm run test -- brave_browser_tests, npm run test -- brave_unit_tests wiki
  • npm run lint, npm run presubmit wiki, npm run gn_check, npm run tslint
• Ran git rebase master (if needed)

Reviewer Checklist:

• A security review is not needed, or a link to one is included in the PR description
• New files have MPL-2.0 license header
• Adequate test coverage exists to prevent regressions
• Major classes, functions and non-trivial code blocks are well-commented
• Changes in component dependencies are properly reflected in gn
• Code follows the style guide
• Test plan is specified in PR before merging

After-merge Checklist:

• The associated issue milestone is set to the smallest version that the
  changes has landed on
• All relevant documentation has been updated, for instance:
  • https://github.com/brave/brave-browser/wiki/Deviations-from-Chromium-(features-we-disable-or-remove)
  • https://github.com/brave/brave-browser/wiki/Proxy-redirected-URLs
  • https://github.com/brave/brave-browser/wiki/Fingerprinting-Protections
  • https://github.com/brave/brave-browser/wiki/Brave%E2%80%99s-Use-of-Referral-Codes
  • https://github.com/brave/brave-browser/wiki/Custom-Headers
  • https://github.com/brave/brave-browser/wiki/Web-Compatibility-Exceptions-in-Brave
  • https://github.com/brave/brave-browser/wiki/QA-Guide
  • https://github.com/brave/brave-browser/wiki/P3A

Test Plan:

BraveSessionRestoreBrowserTest.Serialization
BraveContentSerializedNavigationDriverTest.*

1. Install any NewTab extension such as https://chrome.google.com/webstore/detail/momentum/laookkfknpbbblfpciffpaejjkokdgca
2. Create another NTP and check extension's NTP is loaded
3. Relaunch and check that lastly opened NTP loaded extension's NTP