[fenix] For https://github.com/mozilla-mobile/fenix/issues/26884: Properly disable the jumpBackIn and TCP CFRs in BookmarksTest

app/src/androidTest/java/org/mozilla/fenix/ui/BookmarksTest.kt

@@ -51,6 +51,7 @@ class BookmarksTest {
 
     @get:Rule
     val activityTestRule = HomeActivityTestRule()
+    private val featureSettingsHelper = activityTestRule.featureSettingsHelper
 
     @Rule
     @JvmField
@@ -63,8 +64,8 @@ class BookmarksTest {
             dispatcher = AndroidAssetDispatcher()
             start()
         }
-        val settings = activityTestRule.activity.settings()
-        settings.shouldShowJumpBackInCFR = false
+        featureSettingsHelper.setJumpBackCFREnabled(false)
+        featureSettingsHelper.setTCPCFREnabled(false)
     }
 
     @After