[Instant Hotspot] Rename Network to Internet in Settings

Renames Network to Internet in Settings when instant-hotspot-rebrand
flag is enabled

Screenshot: https://screenshot.googleplex.com/7FSB7LBDHD8NtZT.jpg
Bug: b/290370273
Change-Id: I59fd6326c88cb7765cb5fd5834ec35ca7b6da14b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5385710


Auto-Submit: Rudransh Dikshit <rudranshd@google.com>
Commit-Queue: Connie Xu <conniekxu@chromium.org>
Reviewed-by: Connie Xu <conniekxu@chromium.org>
Reviewed-by: Wes Okuhara <wesokuhara@google.com>
Cr-Commit-Position: refs/heads/main@{#1282757}