Add short codes for DCB to free UK and 44567 to standard US.

UK short codes are used by Direct Carrier Billing (DCB) on
Google Play. US short code excludes the Google Wallet dedicated
short code (being used by the Google Wallet team to send
notifications to users) from premium phone numbers.

Change-Id: Idea06bb773d054b9cdc87fad51a428dde1ab83fe
Signed-off-by: Vasco Brito <vascob@google.com>