User/mahimashukla/3 p drag and drop

[mahimaMSFT]

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Description

Drag and drop of files in compose should upload file to 3P storage providers ( Box, Google Drive, Egnyte
etc) when default provider is not ODSP.

If this Pull Request should close/resolve any issues when merged, use the special syntax for that here.

Main changes in the PR:

1. Added the API which can be used by the 3p apps to get the files which were dragged and dropped in compose, when user wants to upload in 3P apps.
2. Unit test to test the new API's

Validation

Validation performed:

1. Validated the code with unit test cases.
2. Created a small local app to check if the new API's are working as expected.

Unit Tests added:

Unit tests are required for all changes. If no unit tests were added as part of this change, please explain why they aren't necessary.

Yes, unit test cases are added.

End-to-end tests added:

Yes

Additional Requirements

Change file added:

Ensure the change file meets the formatting requirements.

Yes

Next/remaining steps:

List the next or remaining steps in implementing the overall feature in subsequent PRs (or is the feature 100% complete after this?).

Remove this section if n/a

• Item 1
• Item 2

Screenshots:

Remove this section if n/a

Before	After
< image1 >	< image2 >

[TrevorJoelHarris]

Until your feature request has been approved we won't be reviewing this FYI.

[shrshindeMSFT]

Please add this capability to test app for E2E test case also, how this will mimic the real scenario. For reference, please refer to this PR adding visualMedia capability

[shrshindeMSFT]

Can you please re-write this comment.

[shrshindeMSFT]

Some minor comment related changes.

[shrshindeMSFT]

LGTM 🚢