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This is a reland of 1546f3b4

Original change's description:
> Add policy logic to clipboard dlp controller
>
> 1. Changed EnterpriseClipboardDlpController logic
> to be based on the policy logic in DlpRulesManager.
> 2. Added DlpRulesManager::IsAnyRestrcitedComponents
> to decide if any component is restricted.
>
> Bug: 1102332
> Change-Id: Ib1abc64c71540cb431f94d4dfae44212ef8d3597
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2416451
> Commit-Queue: Aya Elsayed <ayaelattar@chromium.org>
> Reviewed-by: Sergey Poromov <poromov@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#810586}

Bug: 1102332
Change-Id: I2416dea8c4fa08d40d89feea9f28f590cd47c819
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2431927Reviewed-by: Sergey Poromov <poromov@chromium.org>
Reviewed-by: Maksim Ivanov <emaxx@chromium.org>
Commit-Queue: Sergey Poromov <poromov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#810733}