fix: intent type not set in case of multiple mime types filter

[Protino]

Summary

This PR fixes issue #513, where even after restricting file types the user could choose any file type (only in case of multiple types)

This is fixed by calling setType on ACTION_GET_CONTENT intent with provided mimeTypes separated by |

Test Plan

What's required for testing (prerequisites)?

The example application is sufficient, provided the emulator/device has some example .doc and .png files

What are the steps to reproduce (after prerequisites)?

Steps to reproduce the issue -

• Open the example app (without this commit) on an android device
• Select Open picker for multi-selection of word files option
• If there are image files in the gallery, you'll be able to select them

Steps to verify the fix - Re-run the app with this commit merged, will only be able to select restricted file types.

Compatibility

OS	Implemented
iOS	✅
Android	✅

Checklist

• [x] I have tested this on a device and a simulator
• [ ] I added the documentation in README.md
• [ ] I updated the typed files (TS and Flow)

[vonovak]

thank you for the PR and sorry for taking so long, I needed to do https://github.com/rnmods/react-native-document-picker/commit/66efeab9774db3dcec16b13b8e987399880b5f35 first to be able to test it out :)

[caijiami]

@vonovak @Protino I have updated 8.1.1 and I still have all the files in Android. I only want PDF and docx, but the file selector still has APK, text and other files