Add active user changed handling for App Service app window.

Update AppServiceProxy when the user is switched because
AppServiceProxy is based on profile.

Add MultiProfileBrowserStatusMonitor to ChromeLauncherController when
kAppServiceInstanceRegistry flag is enabled.

BUG=1011235

Change-Id: Id46f72d2334b94f601275560088112180c5bfc87
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1940314
Commit-Queue: Nancy Wang <nancylingwang@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#720789}
7 files changed