fix(module: calendar): fix timepicker select error

[nuonuoge]

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
[x] No

Other information

[codecov]

Codecov Report

Merging #216 into master will increase coverage by 0.2%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master     #216     +/-   ##
=========================================
+ Coverage   86.25%   86.45%   +0.2%     
=========================================
  Files         224      224             
  Lines        7311     7311             
  Branches     1029     1029             
=========================================
+ Hits         6306     6321     +15     
+ Misses        600      587     -13     
+ Partials      405      403      -2

Impacted Files	Coverage Δ
...onents/calendar/timepicker/timepicker.component.ts	79.54% <100%> (+4.54%)	⬆️
components/calendar/calendar.component.ts	71.42% <0%> (+0.95%)	⬆️
...nts/date-picker-view/date-picker-view.component.ts	92% <0%> (+1.33%)	⬆️
components/date-picker/date-picker.component.ts	75.1% <0%> (+2.14%)	⬆️

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[3fuyu]

#212