AOSP/DeskClock - Add Kotlin files for City data files

Test: manual - Ran the following on Sargo phone. Tested interactions
with the city list (ie. searching, selecting/unselecting a city).

$ source build/envsetup.sh
$ lunch aosp_sargo-userdebug
$ make DeskClockKotlin -j
$ adb install out/target/product/sargo/product/app/DeskClockKotlin/DeskClockKotlin.apk

BUG: 157255731
Change-Id: Ia43fab65ed0352f37f62ede5e46816a20b9b5cc3
5 files changed