[fenix] For https://github.com/mozilla-mobile/fenix/issues/20513: Use UrlMetricType for search engine submission url.

app/metrics.yaml

@@ -1834,11 +1834,11 @@ search.default_engine:
       - android-probes@mozilla.com
       - erichards@mozilla.com
     expires: never
-  submission_url:
-    type: string
+  search_url:
+    type: url
     lifetime: application
     description: |
-      If the search engine is pre-loaded with Fenix this value will be he base
+      If the search engine is pre-loaded with Fenix this value will be the base
       URL we use to build the search query for the search engine. For example:
       https://mysearchengine.com/?query=%s. If it's a custom search engine
       (defined: https://github.com/mozilla-mobile/fenix/issues/1607) the value
@@ -1847,6 +1847,7 @@ search.default_engine:
       - metrics
     bugs:
       - https://github.com/mozilla-mobile/fenix/issues/800
+      - https://github.com/mozilla-mobile/fenix/issues/20513
     data_reviews:
       - https://github.com/mozilla-mobile/fenix/pull/1606
       - https://github.com/mozilla-mobile/fenix/pull/5216

app/src/main/java/org/mozilla/fenix/FenixApplication.kt

@@ -647,7 +647,7 @@ open class FenixApplication : LocaleAwareApplication(), Provider {
                 SearchDefaultEngine.apply {
                     code.set(searchEngine.id)
                     name.set(searchEngine.name)
-                    submissionUrl.set(searchEngine.buildSearchUrl(""))
+                    searchUrl.set(searchEngine.buildSearchUrl(""))
                 }
             }
         }

app/src/test/java/org/mozilla/fenix/FenixApplicationTest.kt

@@ -185,6 +185,6 @@ class FenixApplicationTest {
         // not mock most of the objects telemetry is collected from.
         assertFalse(SearchDefaultEngine.code.testHasValue())
         assertFalse(SearchDefaultEngine.name.testHasValue())
-        assertFalse(SearchDefaultEngine.submissionUrl.testHasValue())
+        assertFalse(SearchDefaultEngine.searchUrl.testHasValue())
     }
 }