When images are recovered from storage due to resizing storage, they
were marked as clean and not always re-copied to the new storage.

Bug: angleproject:5757
Bug: chromium:1188854
Change-Id: Idd11025820433ab74ff769cd9508efcec4575c32
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2763282Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Alexey Knyazev <lexa.knyazev@gmail.com>
Commit-Queue: Geoff Lang <geofflang@chromium.org>
(cherry picked from commit 0a80f2e1)
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2846981