Specify blur quality for TimeManagementContainer

For ChromeOS, system uses a lower quality blur
(ColorProvider::kBackgroundBlurQuality) for better performance.

Change-Id: I6b2ba9e6de7a047eb49160b5da5109a2d8931650
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6493527
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Commit-Queue: Zoraiz Naeem <zoraiznaeem@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1453503}