Upgrading allowlist for calendar provider

This allows it to schedule alarms while the device is in doze without
needing SCHEDULE_EXACT_ALARM permission, which is user visible.

Test: adb logcat -s AndroidRuntime
should show no crashes for "com.android.providers.calendar" due to
missing SCHEDULE_EXACT_ALARM.

Bug: 171306433
Change-Id: I3dc358f0de0f6d869c3c6e7d6c2c243dc2348096