[AI] Cannot select the local player when using GameplayDebugger while the Mass category is active

The GameplayDebugger is not updating its displayed information for the local player when attempting to select the local player. This behavior seems to only occur when the Mass category is active AND the local player has an associated entity. If the category is not activated, selecting the local player displays its information for GAS, movement mode in AI, etc. However, if the player has an associated entity via its MassAgent component, attempting to select the local player fails to select any actor or entity, and this is shown in the debugger as no entity selected and the other categories being empty.

Some testing showed that FGameplayDebuggerCategory_Mass::OnEntitySelected is setting the debug actor and this could be stomping the change made in UGameplayDebuggerLocalController::OnSelectLocalPlayer.

1. Open a level with MassSpawner set up to spawn entities from a config
2. Add a MassAgentComponent to the player Pawn if one does not exist
3. Add an entity config to the player
4. PIE
5. Open GameplayDebugger
6. Pick an Entity using Shift+P
7. Attempt to select the local player by pressing Shift+Apostrophe

Expected Result: The GameplayDebugger is refreshed with information for the local player in all relevant categories.

Actual Result: The GameplayDebugger shows no entity selected and the other categories are not showing information for the local player either such as the local player's movement modes.