AOSP/DeskClock - Updated to sdkVersion 29.

Changed android:name for HandleApiCalls and HandleSetAlarmApiCalls to be same as
Google Playstore's Clock app. Updated minSdkVersion to "23"  ala Clock app.

BUG: 133177396
BUG: 143990962
BUG: 150612638

Test: manual - Tested the DeskClock UI manually and tested the alarm, stopwatch and timer.

$ make -j 40

$ ls -l  out/target/product/bonito/product/app/DeskClock/DeskClock.apk
-rw-r----- 1 rtenneti primarygroup 6125545 Apr 27 12:57 out/target/product/bonito/product/app/DeskClock/DeskClock.apk

$ adb install -r out/target/product/generic/system/product/app/DeskClock/DeskClock.apk

+ Verified by setting up the alaram and waiting for the alarm to go off.

Change-Id: I5f4c8a4701635f43c9057759a2ad702968a04020
Signed-off-by: Jesse Chan <jc@lineageos.org>