AOSP/DeskClock - Added SET_ALARM permission check

Added SET_ALARM permission check for the HandleApiCalls activity.

Test: manual - tested the DeskClock UI manually, as well as testing the
alarm, stopwatch and timer

Forrest run: go/forrest-run/L31100000555861022 to test CtsMediaTestCases module

Change-Id: I9e42e0bc3eb1375d170091ec79315967be1efd32
Signed-off-by: Jesse Chan <jc@lineageos.org>