File drag and drop container won't have proper identification text for screen readers

Steps to Reproduce

1. Go to https://www.topcoder.com/challenges/30095032/submit
2. Press Tab key till the drag and drop section is selected

Expected Result Should use proper labeling so that the user can identify the controller

Actual Result File drag and drop container won't have proper identification text for screen readers

Device: Desktop/Labtop Operating System: Windows Browser: Chrome

WCAG Category: 1. Perceivable WCAG Level: A WCAG Success Criterion: 1.3.1 Info and Relationships Screen Reader Used: JAWS Accessibility Audit Tool used: N/A

Attachment https://topcodermsft-my.sharepoint.com/personal/pd-topcoder_topcodermsft_onmicrosoft_com/Documents/Forms/All.aspx?cid=58da9b68%2Df2a3%2D45d2%2Dbbae%2D15abdfd0865b&FolderCTID=0x0120005C598A51049FC14CBA882E1AEE168F51&sortField=Modified&isAscending=true&id=%2Fpersonal%2Fpd%2Dtopcoder%5Ftopcodermsft%5Fonmicrosoft%5Fcom%2FDocuments%2FMSFT%2DTeams%2DQA%2FJune%202019%2F29%20Jun%2FTest%20Results%2FBug%20Videos%20%26%20Log%20Files%2Fcodejam%2DAccessibility%2F58

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