GitLab

Add ESimManager bindings to OS Settings and create
FakeESimManagerRemote to use as a mock for unit testing.

Bug: 1093185
Change-Id: I03ab65d280f497ef9fac39bd1b48cef725083441
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2536113Reviewed-by: Nasko Oskov <nasko@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Azeem Arshad <azeemarshad@chromium.org>
Commit-Queue: Gordon Seto <gordonseto@google.com>
Cr-Commit-Position: refs/heads/master@{#828004}