[services] Rename `ShouldRequireNetworkIsolationKey`

rename ShouldRequireNetworkIsolationKey to ShouldRequireIsolationInfo

Bug: 1445752
Change-Id: I2630d977056967b6a1077c11f62cad4135b3326c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4562876


Reviewed-by: Colin Blundell <blundell@chromium.org>
Commit-Queue: Colin Blundell <blundell@chromium.org>
Auto-Submit: Ho Cheung <uioptt24@gmail.com>
Reviewed-by: Andrew Williams <awillia@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1148934}