Add a permission resource for the protected media id.

Matched Chromium change: http://crrev.com/309553004
> aw: Add ProtectedIdPermissionRequest.
>
> The DRM ID can be exploited to identify users. so the information
> should be handled under user's explict permission.
> This CL hooks up Chromium's permission request with Android Webview's
> permission mechanism.
>
> BUG=346841
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=276149

Bug: 11762354

Change-Id: Ife3c123ecca2c577ed1bc02a110b87618c6569cf