Add google-owned SMS short codes for AR and KE, update PE short code

  Google RCS uses FTEU MO SMS for phone number verification. These are two new shortcodes that have been acquired and should be added to the list, and one that has changed and should be updated.

Ownership proof for AR-40023:
https://screenshot.googleplex.com/5ZEktCd3p6WFQaD

Ownership proof for PE-40778:
https://screenshot.googleplex.com/6Xm3gjz8ysTSsfX

Ownership proof for KE-40023:
https://screenshot.googleplex.com/7cadxdd4q2Y82fU
BUG: 289050923
TEST: tested the regional configuration with and without the whitelisting per go/premiumsms

Change-Id: Ib3de4cd31947318b269568fcb0cfbd0d089f2a7c