Picker:[Keros bug]: Certain ARIA roles must contain particular children

[neeraj-khanna]

Environment Information

• Package version(s): 6.92.0
• Browser and OS versions: chrome version 69.0.3497.100 and OS version windows 10

Bug repro URL: https://developer.microsoft.com/en-us/fabric#/components/pickers

Actual behavior:

Keros issue : Certain ARIA roles must contain particular children

Expected behavior:

keros should not give any issue

[JasonGore]

Closing as duplicate of #6891.