AOSP/DeskClock - Add Kotlin files for Alarm classes in root directory

Test: manual - Tested the DeskClock UI. As well unit tests were run as
follows

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

BUG: 157255731
Change-Id: Ib55fd561f5ef6f31c5ea8474328cc79a63c568f8
7 files changed