[iOS] Remove use of appStateDidExitSafeMode in SceneController.

Removes the use of appStateDidExitSafeMode in SceneController by sinking
app- and scene observer methods in one method. The notification that
the app goes out of safe mode init stage is enough to kick off an event
that sets up the scene to the appopriate level.

Bug: 1198301
Change-Id: Ic197f868e94eceeda315cba43e1a841e5350b97b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2825612
Reviewed-by: Mark Cogan <marq@chromium.org>
Reviewed-by: Vincent Boisselle <vincb@google.com>
Commit-Queue: Stepan Khapugin <stkhapugin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#874710}
GitOrigin-RevId: 145bce199d3932e816fb113c58640a4f1ed6c1b4
1 file changed