fix(module: PupupService): fix when using multiple PupupService working error

[Guoyuanqiang]

…ng error

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?

[ ] Yes
[ ] No

Other information

[codecov]

Codecov Report

Merging #292 into master will decrease coverage by 0.02%.
The diff coverage is 72.22%.

@@            Coverage Diff             @@
##           master     #292      +/-   ##
==========================================
- Coverage   89.95%   89.92%   -0.03%     
==========================================
  Files         228      228              
  Lines        6820     6831      +11     
  Branches      550      551       +1     
==========================================
+ Hits         6135     6143       +8     
- Misses        522      525       +3     
  Partials      163      163

Impacted Files	Coverage Δ
components/modal/modal.service.ts	70.45% <0%> (ø)	⬆️
components/action-sheet/action-sheet.service.ts	84.31% <100%> (ø)	⬆️
components/picker/picker.service.ts	94.44% <100%> (ø)	⬆️
components/core/services/popup.service.ts	83.87% <73.33%> (-6.13%)	⬇️

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