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Since vulkan swap chain will not modify the content of images, so
we can set preserve_buffer_content in output surface capabilities,
and then the SkiaRenderer will only draw damage area instead of the
whole buffer to save CPU and GPU cycles.

Note: we are using FIFO Vulkan swap chain, so the swap chain should
return images in presenting order.

Bug: 1043388
Change-Id: I6f3a4f84027607fe5cb6ecd992552c535c72ed52
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2042766
Commit-Queue: Peng Huang <penghuang@chromium.org>
Reviewed-by: Vasiliy Telezhnikov <vasilyt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#744752}