fix(change-hours): run change hours interval outside of angular zone

[dvargas46]

What: Updated change hours effect interval to run outside of Angular zone. This should fix the testability not stabilizing issue without affecting the nature of the effect (to adjust the theme upon app load based on current time).

Closes #511

Issue number: #511

[codecov-io]

Codecov Report

Merging #516 into master will decrease coverage by 0.39%. The diff coverage is 40%.

@@            Coverage Diff            @@
##           master     #516     +/-   ##
=========================================
- Coverage    70.1%   69.71%   -0.4%     
=========================================
  Files          65       65             
  Lines         552      558      +6     
  Branches       34       35      +1     
=========================================
+ Hits          387      389      +2     
- Misses        157      161      +4     
  Partials        8        8

Impacted Files	Coverage Δ
...-starter/src/app/core/settings/settings.effects.ts	60.97% <40%> (-7.6%)	:arrow_down:
...eatures/examples/form/components/form.component.ts	76.19% <0%> (+4.76%)	:arrow_up:

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[tomastrajan]

@dvargas46 thanks for your contribution!