feat(module: modal): Modal.operation support maskClosable params

[shuizhongxiong]

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?

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

What is the current behavior?

Modal.operation 不支持点击蒙版关闭弹窗

Issue Number: #799

What is the new behavior?

Modal.operation 支持点击蒙版关闭弹窗

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[codecov]

Codecov Report

Merging #804 (5bc5684) into master (cd5216a) will decrease coverage by 0.15%.
The diff coverage is 54.05%.

@@            Coverage Diff             @@
##           master     #804      +/-   ##
==========================================
- Coverage   86.86%   86.71%   -0.16%     
==========================================
  Files         164      164              
  Lines        6682     6614      -68     
  Branches     1117     1107      -10     
==========================================
- Hits         5804     5735      -69     
+ Misses        430      429       -1     
- Partials      448      450       +2     

Impacted Files	Coverage Δ
components/modal/modal.module.ts	100.00% <ø> (ø)
components/modal/modal.service.ts	61.33% <52.94%> (-13.67%)	⬇️
components/modal/modal-options.provider.ts	96.15% <66.66%> (-3.85%)	⬇️
components/date-picker/date-picker.component.ts	74.09% <0.00%> (-1.16%)	⬇️
...s/calendar/datepicker/datepicker.base.component.ts	83.63% <0.00%> (-0.61%)	⬇️
components/core/util/position.ts	81.25% <0.00%> (-0.57%)	⬇️
components/image-picker/image-picker.component.ts	72.00% <0.00%> (-0.23%)	⬇️
components/steps/steps.component.ts	88.67% <0.00%> (-0.21%)	⬇️
components/tabs/tabs.component.ts	87.67% <0.00%> (-0.17%)	⬇️
...ts/calendar/single-month/single-month.component.ts	92.94% <0.00%> (-0.17%)	⬇️
... and 9 more

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