Update autoLink URL regex to match empty path, $ and _

Update URL regular expression to match
- path and query that contains dollar sign
- domain name that contains underscore
- empty path with query parameters. i.e. a.com?q=v

Bug: 27436084
Bug: 27501264
Change-Id: I3884624e145ccc1175915327dc2f280ef4e55ce1
2 files changed