Adding owners for CarrierConfigManager separate from parent.

New carrier config keys shall be reviewed by a TL as part of addition.
This is to enforce that new carrier config keys are added as properly
defined public API keys.

Test: Owners file change only.
Fixes: 243858315
Change-Id: I3a86d95242b59adc150fe619681b5d5cbe00c11f
1 file changed