Label: Use GetPreferredSize(SizeBounds) in /ash/ambient

GetPreferredSize() considers the currently available layout space to be
unlimited. However, for some views (eg: label), their preferred size is
strongly related to the currently available space, which leads us to
need to use GetPreferredSize() + GeHeightForWidth(), which results in
two layout calculations. It also resulted in some errors that could not
be repaired, eg: 41295639.

In the end we chose to use GetPreferredSize(SizeBounds) to solve these
problems. There is also the concept of constraint space in Blink
LayoutNG.

This CL was uploaded by git cl split.

R=cowmoo@google.com

Bug: 40232718
Change-Id: I926f39c343cf85eca88bb0ed63c88736d8d88be1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5426258
Auto-Submit: Weidong Liu <weidongliu@chromium.org>
Reviewed-by: Jeffrey Young <cowmoo@google.com>
Commit-Queue: Jeffrey Young <cowmoo@google.com>
Cr-Commit-Position: refs/heads/main@{#1284160}