Merge "Implement API to retrieve carrier configs as needed" am: 8ecc104d06 am: f6c464b20e

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telephony/+/2466902

Change-Id: Ibba3ff4d514a1c31a9361a3a687022cff5d0132d
Signed-off-by: Automerger Merge Worker <[email protected]>