Reformat local Korean numbers in national format.

Korean carriers don't want the country codes displayed for local calls.
However the network returns the entire phone number including the
country code for Volte calls. According to the Koean phone numbering
scheme (https://en.wikipedia.org/wiki/Telephone_numbers_in_South_Korea),
we need to replace the country code +82 with a 0 prepended to the
carrier code to format it as a national number.

BUG: 22862845
Change-Id: Ifbb9eb8d5379608b4ea9d95ae7744779340b188e