What is the name of this type of Android Studio popup windows or ideaVim action so i can navigate in it using IdeaVim?

I want to be able to navigate in this kind of windows in Android Studio using IdeaVim. For that I need the name of propper action or the name of this type of popups so I can search further.

Examples of what I'm looking for:

Example A

Example B

I've already mapped navigation for this kind of auto-completion popups (Example of what I'm NOT looking for),
but the mapping does not applies to the example A & B above.

You should check out IdeaVim's readme. There is a chapter about executing IDE actions https://github.com/JetBrains/ideavim#executing-ide-actions.
So the actions you are looking for:
map ?? <Action>(ShowIntentionActions) - to open the intention actions
map ?? <Action>(GoToAction) - to open action search window
But at the moment IdeaVim works only in the editor, so you cant use hjkl to navigate in the windows above. See https://youtrack.jetbrains.com/issue/VIM-2347/Navigation-on-IDEA-windows-like-Settings-Switcher-etc

The action id/name of your example 1 is ShowIntentionActions and Show Context Menu.

The action id/name of your example 2 is GotoAction and Find Action.

You could use the ways here to find any action id that you need for IdeaVIM: https://github.com/JetBrains/ideavim#finding-action-ids