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

(cherry picked from commit ce68e6f88e8bbfe096f4843c6f393f259dde6248)

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>