tree de400c532d8f671b1daf4b54a536fbfd578ad007
parent 9c1eb78c914753f9f6aa3fe5f2675a89c9f34f1c
author Andrew Wilson <apwilson@google.com> 1547246044 -0800
committer CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> 1547670921 +0000

[sessionmgr] Delay initializing services until a SessionShell comes up and connects.

Currently when the sessionmgr starts it initializes all the services the
session shell needs before it launches the session shell.  This causes a
significant delay to the session shell starting as we need to launch
numerous components before it gets to session shell.

This change makes session shell start before any other services and the
other services are started upon session shell first asking for them.

Test: Logged in and gathered metrics with traceutil to see the order of things being launched.

Change-Id: I42a654b874cbc910957eba5975e6befc28b68d03