Do not allow file:// access when it is disabled. Do not merge.

Cherry pick of If2793f31cb37e0d3af15cb18e818bfa4058167fd

If WebSettings is configured to disallow access to file://
URLs, then block them.

Bug: 5773763
Change-Id: I0ab84cde90c955d31077329fddebc25978287c64
1 file changed