FenixSearchEngineProvider: Use dummy location service in debug builds.

Workaround for issue described in:
mozilla-mobile/android-components#5989

For debug builds it is unnecessary to use the actual location provider since those builds
do not have an API key configured. With that patch we replace the location provider with
a dummy implementation in debug builds.

app/src/main/java/org/mozilla/fenix/components/searchengine/FenixSearchEngineProvider.kt

@@ -18,9 +18,11 @@ import mozilla.components.browser.search.provider.SearchEngineList
 import mozilla.components.browser.search.provider.SearchEngineProvider
 import mozilla.components.browser.search.provider.filter.SearchEngineFilter
 import mozilla.components.browser.search.provider.localization.SearchLocalizationProvider
+import mozilla.components.service.location.LocationService
 import mozilla.components.service.location.MozillaLocationService
 import mozilla.components.service.location.search.RegionSearchLocalizationProvider
 import org.mozilla.fenix.BuildConfig
+import org.mozilla.fenix.Config
 import org.mozilla.fenix.ext.components
 import org.mozilla.fenix.ext.settings
 import java.util.Locale
@@ -29,16 +31,19 @@ import java.util.Locale
 open class FenixSearchEngineProvider(
     private val context: Context
 ) : SearchEngineProvider, CoroutineScope by CoroutineScope(Job() + Dispatchers.IO) {
+    private val locationService: LocationService = if (Config.channel.isDebug) {
+        LocationService.dummy()
+    } else {
+        MozillaLocationService(
+            context,
+            context.components.core.client,
+            BuildConfig.MLS_TOKEN
+        )
+    }
 
     @VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
     open val localizationProvider: SearchLocalizationProvider =
-        RegionSearchLocalizationProvider(
-            MozillaLocationService(
-                context,
-                context.components.core.client,
-                BuildConfig.MLS_TOKEN
-            )
-        )
+        RegionSearchLocalizationProvider(locationService)
 
     open var baseSearchEngines = async {
         AssetsSearchEngineProvider(localizationProvider).loadSearchEngines(context)