fix(module: action-sheet): fix click item will response background click event

[Guoyuanqiang]

…ick event

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/NG-ZORRO/ng-zorro-antd-mobile/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Application (the showcase website) / infrastructure changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

[x] Yes
[ ] No

Other information

[codecov]

Codecov Report

Merging #98 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #98      +/-   ##
==========================================
+ Coverage   86.52%   86.53%   +<.01%     
==========================================
  Files         209      209              
  Lines        6896     6897       +1     
  Branches      970      970              
==========================================
+ Hits         5967     5968       +1     
  Misses        539      539              
  Partials      390      390

Impacted Files	Coverage Δ
components/action-sheet/action-sheet.service.ts	86.2% <100%> (+0.24%)	⬆️

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