Field Filter UI update - Single and Multi select

[harinij]

Is your feature request related to a problem? Please describe.
Currently, the single and multi select field's filter does not support "not equal to" option and only supports equal to or matches one of.

Describe the solution you'd like
Add ability to filter by "Not equal to" option

Implementation details
Please find the relevant Firestore documentation: https://cloud.google.com/firestore/docs/query-data/queries#query_operators

[nandinikaregowdra]

I would like to work on this issue.