Adding tests for allow-while-idle alarms

Testing allow-while-idle alarms work as expected with app standby
throttling because there can be cases where both the normal
allow-while-idle throttling and app standby throttling may not be in
agreement.
Also added test that makes sure power-whitelisted apps are exempt from
app standby.

Test: atest CtsAlarmManagerTestCases:AppStandbyTests

Bug: 72660630
Bug: 72916765
Change-Id: I06011d055a2b880da5eccce3a66087b9f039b4cc
1 file changed