Bug 1813877 - Announce page title with talkback when swiping on navbar

Talkback now announces the name of the tab switched to using
swipe left or right gestures on the navbar

app/src/main/java/org/mozilla/fenix/browser/BaseBrowserFragment.kt

@@ -143,6 +143,7 @@ import org.mozilla.fenix.onboarding.FenixOnboarding
 import org.mozilla.fenix.perf.MarkersFragmentLifecycleCallbacks
 import org.mozilla.fenix.settings.SupportUtils
 import org.mozilla.fenix.settings.biometric.BiometricPromptFeature
+import org.mozilla.fenix.tabstray.ext.toDisplayTitle
 import org.mozilla.fenix.theme.ThemeManager
 import org.mozilla.fenix.utils.allowUndo
 import org.mozilla.fenix.wifi.SitePermissionsWifiIntegration
@@ -1135,6 +1136,8 @@ abstract class BaseBrowserFragment :
             updateThemeForSession(selectedTab)
         }
 
+        binding.engineView.asView().contentDescription = selectedTab.toDisplayTitle()
+
         if (browserInitialized) {
             view?.let {
                 fullScreenChanged(false)

app/src/main/res/layout/fragment_browser.xml

@@ -32,6 +32,7 @@
                     android:id="@+id/engineView"
                     android:layout_width="match_parent"
                     android:layout_height="match_parent"
+                    android:accessibilityLiveRegion="polite"
                     android:visibility="gone" />
             </mozilla.components.ui.widgets.VerticalSwipeRefreshLayout>