fix(checkbox): Throws exception with Ivy

[trimox]

closes #2109

[codecov]

Codecov Report

Merging #2115 into master will increase coverage by 0.06%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2115      +/-   ##
==========================================
+ Coverage   90.52%   90.59%   +0.06%     
==========================================
  Files         100      100              
  Lines        4327     4337      +10     
  Branches      553      557       +4     
==========================================
+ Hits         3917     3929      +12     
+ Misses        216      214       -2     
  Partials      194      194              

Impacted Files	Coverage Δ
packages/dialog/dialog.component.ts	85.33% <0.00%> (+1.33%)	⬆️
packages/checkbox/checkbox.ts	98.01% <0.00%> (+0.14%)	⬆️
packages/ripple/ripple.service.ts	81.25% <0.00%> (+2.08%)	⬆️

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