New regular expression to autolink URLs

Introduced a new regular expression to autolink URLs. Previous regular
expression used the protocol as an optional rule. The new expression
applies separate rules for strings that do not start with a known
protocol and strings that do start with a known protocol.

- In order to reuse previous regular expression definitions for
different parts of a URL, created constants for different parts of
WEB_URL expression.
- Separated the test cases for WEB_URL in order to remove the suppress
command and make them running again.
- Fixed failing tests for punycode urls, which were causing existing
tests to fail.
- Introduced new a regular expression for URL matching.
- Changed the protocol rule to be case insensitive.
- Updated IANA TLDs.
- Added tests for the new regular expression.
- Added tests for Linkify.
- Bug 9622849 is partially fixed.

Bug: 25727599
Bug: 9622849
Bug: 24500693
Bug: 23189367
Bug: 24543148

Change-Id: Ifd62455d342ca7adb22996246ff652e1d5944bec