For #13390 - Fix for stuck readerMode appearance controls

app/src/main/java/org/mozilla/fenix/browser/readermode/ReaderModeController.kt

@@ -27,7 +27,10 @@ class DefaultReaderModeController(
     private val isPrivate: Boolean = false
 ) : ReaderModeController {
     override fun hideReaderView() {
-        readerViewFeature.withFeature { it.hideReaderView() }
+        readerViewFeature.withFeature {
+            it.hideReaderView()
+            it.hideControls()
+        }
     }
 
     override fun showReaderView() {

app/src/test/java/org/mozilla/fenix/browser/readermode/DefaultReaderModeControllerTest.kt

@@ -54,6 +54,7 @@ class DefaultReaderModeControllerTest {
         every { readerViewFeature.hideReaderView() } returns Unit
         every { readerViewFeature.showReaderView() } returns Unit
         every { readerViewFeature.showControls() } returns Unit
+        every { readerViewFeature.hideControls() } returns Unit
     }
 
     @Test
@@ -61,6 +62,7 @@ class DefaultReaderModeControllerTest {
         val controller = DefaultReaderModeController(featureWrapper, readerViewControlsBar)
         controller.hideReaderView()
         verify { readerViewFeature.hideReaderView() }
+        verify { readerViewFeature.hideControls() }
     }
 
     @Test