Merge "Make taskbar accessibility announcement when user is in app only." into tm-qpr-dev

quickstep/res/layout/transient_taskbar.xml

@@ -26,6 +26,8 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:gravity="center"
+        android:focusable="true"
+        android:importantForAccessibility="yes"
         android:forceHasOverlappingRendering="false"
         android:layout_gravity="bottom"
         android:layout_marginBottom="@dimen/transient_taskbar_bottom_margin"

quickstep/src/com/android/launcher3/taskbar/TaskbarStashController.java

@@ -600,7 +600,11 @@ public class TaskbarStashController implements TaskbarControllers.LoggableTaskba
                 if (!mIsStashed) {
                     tryStartTaskbarTimeout();
                 }
-                mControllers.taskbarViewController.announceForAccessibility();
+
+                // only announce if we are actually animating
+                if (duration > 0 && isInApp()) {
+                    mControllers.taskbarViewController.announceForAccessibility();
+                }
             }
         });
     }