Remove unnecessary parameter.

The idleUntil parameter wasn't necessary since the new state value
indicates whether DeviceIdleController should call
AlarmManager.setIdleUntil or not.

Bug: 270672228
Bug: 273742717
Test: atest FrameworksMockingServicesTests:DeviceIdleControllerTest
Change-Id: I7274266d6aa138238473f81f4e85636c8be37517