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This CL adds the generic colored avatar to the avatar icons shown on
'chrome://settings/manageProfile' that is only shown for local profile
(No GAIA account).

It also fixes the bug where no selected is shown when the user is using
the GAIA avatar as the chrome avatar.

In a future CL, |kProfileUsingDefaultAvatar, kProfileUsingGAIAAvatar|
prefs will be deleted. The |ManageProfileHandler| should not rely on
these prefs.

Fixed: 1149539
Change-Id: I9cbce03e62efb20a6c466eac9c7e32d1cbc93f18
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2542062
Commit-Queue: Monica Basta <msalama@chromium.org>
Reviewed-by: David Roger <droger@chromium.org>
Reviewed-by: Esmael Elmoslimany <aee@chromium.org>
Cr-Commit-Position: refs/heads/master@{#829194}