Update date during time tick event

Remove extra broadcast action and use existing doze_time_tick alarm to
update slice.

Change-Id: If167c8d81e5f5a67050d7904ce2497c1bdb70e9a
Fixes: 77988364
Test: atest packages/SystemUI/tests/src/com/android/keyguard/KeyguardSliceViewTest.java
Test: atest packages/SystemUI/tests/src/com/android/keyguard/KeyguardStatusViewTest.java
Test: atest packages/SystemUI/tests/src/com/android/systemui/keyguard/KeyguardSliceProviderTest.java