input-item: Add a clear button for android platform

[alwaysloseall]

#2288
First of all, thank you for your contribution! :-)

Please makes sure that these checkboxes are checked before submitting your PR, thank you!

• Make sure that you follow antd's code convention.
• Run npm run lint and fix those errors before submitting in order to keep consistent code style.
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Extra checklist:

if isBugFix :

• Make sure that you add at least one unit test for the bug which you had fixed.

elif isNewFeature :

• Update API docs for the component.
• Update/Add demo to demonstrate new feature.
• Update TypeScript definition for the component.
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This change is 

[paranoidjk]

Does clean icon is a Android Design Guide or something? Why only add in android?

[paranoidjk]

cc @silentcloud

[alwaysloseall]

@paranoidjk the clean icon is gotten from antd-mobile`s assets image.only added in android, cuz ios already have a clear button in input-item

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@4a71fbe). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #2358   +/-   ##
=========================================
  Coverage          ?   56.82%           
=========================================
  Files             ?      144           
  Lines             ?     2439           
  Branches          ?      732           
=========================================
  Hits              ?     1386           
  Misses            ?     1048           
  Partials          ?        5

Flag	Coverage Δ
#web	56.82% <ø> (?)

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[warmhug]

close #2288