Disable the split omnibar by default

Author: 0nko

app/src/main/java/com/duckduckgo/app/appearance/AppearanceActivity.kt

@@ -200,9 +200,8 @@ class AppearanceActivity : DuckDuckGoActivity() {
         val subtitle =
             getString(
                 when (omnibarType) {
-                    OmnibarType.SINGLE_TOP -> R.string.settingsAddressBarPositionTop
+                    OmnibarType.SINGLE_TOP, OmnibarType.SPLIT -> R.string.settingsAddressBarPositionTop
                     OmnibarType.SINGLE_BOTTOM -> R.string.settingsAddressBarPositionBottom
-                    OmnibarType.SPLIT -> throw IllegalStateException("Split omnibar type should not be shown in address bar position setting")
                 },
             )
         binding.addressBarPositionSetting.setSecondaryText(subtitle)

app/src/main/java/com/duckduckgo/app/pixels/remoteconfig/AndroidBrowserConfigFeature.kt

@@ -193,6 +193,6 @@ interface AndroidBrowserConfigFeature {
     @Toggle.DefaultValue(TRUE)
     fun useUnifiedOmnibarLayout(): Toggle
 
-    @Toggle.DefaultValue(TRUE)
+    @Toggle.DefaultValue(FALSE)
     fun splitOmnibar(): Toggle
 }