Add Call Composer Carrier Config keys

Test: cts
Bug: 173437870
Change-Id: I12d78f475b947cedb201ff1b379cc64a8f876e62
Merged-In: I12d78f475b947cedb201ff1b379cc64a8f876e62
(cherry picked from commit 136900101b6bf9d8666dce3e776f426b8105cefa)
2 files changed