fix priority between visual design experiment and trackers experiment (#6054)

Task/Issue URL:
https://app.asana.com/1/137249556945/project/1174433894299346/task/1210234873359130?focus=true

### Description
This PR makes sure that the app is not crashing when two mutually
exclusive experiments are somehow selected.

### Steps to test this PR

_Fresh install_
- [x] Open the app and enable the visual design experiment alongside one
of the variants of O-10
- [x] Settings / Experimental UI 
- [x] Restart the app
- [x] Verify app is not crashing

Author: malmstein

app/src/main/java/com/duckduckgo/app/browser/omnibar/OmnibarLayoutViewModel.kt

@@ -623,6 +623,12 @@ class OmnibarLayoutViewModel @Inject constructor(
                         }
                         viewModelScope.launch {
                             when {
+                                visualDesignExperiment -> {
+                                    command.send(
+                                        Command.StartVisualDesignTrackersAnimation(decoration.entities),
+                                    )
+                                }
+
                                 senseOfProtectionExperiment.isUserEnrolledInModifiedControlCohortAndExperimentEnabled() -> {
                                     command.send(Command.StartExperimentVariant1Animation)
                                 }
@@ -633,12 +639,6 @@ class OmnibarLayoutViewModel @Inject constructor(
                                     )
                                 }
 
-                                visualDesignExperiment -> {
-                                    command.send(
-                                        Command.StartVisualDesignTrackersAnimation(decoration.entities),
-                                    )
-                                }
-
                                 else -> {
                                     command.send(Command.StartTrackersAnimation(decoration.entities))
                                 }