allow CBR to write SMS database

This is to support KR government requirement: CBR message should be available in
SMS.inbox. The solution is to insert CBR message once displayed to
users. this feature is disabled by default and OEM can turn it on for
specific mcc per country/carrier regulations.

Bug: 144749813
Test: Manual test on different messenger apps.
Change-Id: I5535cefb32e89694094299f3b89321f735983ef1