Update AllApps search TAPL APIs support for system back and dismiss.

Design doc: go/toasty-taskbar-tapl

Test: Compiles
Bug: 295366997
Flag: Not needed
Change-Id: I87b0b16c83eefc7e997cfd35901c788853aa9988

tests/tapl/com/android/launcher3/tapl/SearchResultFromQsb.java

@@ -91,7 +91,7 @@ public class SearchResultFromQsb {
      * Taps outside bottom sheet to dismiss and return to workspace. Available on tablets only.
      * @param tapRight Tap on the right of bottom sheet if true, or left otherwise.
      */
-    public Workspace dismissByTappingOutsideForTablet(boolean tapRight) {
+    public void dismissByTappingOutsideForTablet(boolean tapRight) {
         try (LauncherInstrumentation.Closable e = mLauncher.eventsCheck();
              LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
                      "want to tap outside AllApps bottom sheet on the "
@@ -101,8 +101,12 @@ public class SearchResultFromQsb {
             mLauncher.touchOutsideContainer(allAppsBottomSheet, tapRight);
             try (LauncherInstrumentation.Closable tapped = mLauncher.addContextLayer(
                     "tapped outside AllApps bottom sheet")) {
-                return mLauncher.getWorkspace();
+                verifyVisibleContainerOnDismiss();
             }
         }
     }
+
+    protected void verifyVisibleContainerOnDismiss() {
+        mLauncher.getWorkspace();
+    }
 }

tests/tapl/com/android/launcher3/tapl/SearchResultFromTaskbarQsb.java

@@ -45,4 +45,9 @@ public class SearchResultFromTaskbarQsb extends SearchResultFromQsb {
     protected TaskbarSearchWebSuggestion createWebSuggestion(UiObject2 webSuggestion) {
         return new TaskbarSearchWebSuggestion(mLauncher, webSuggestion);
     }
+
+    @Override
+    protected void verifyVisibleContainerOnDismiss() {
+        mLauncher.getLaunchedAppState().assertTaskbarVisible();
+    }
 }

tests/tapl/com/android/launcher3/tapl/Taskbar.java

@@ -101,6 +101,14 @@ public final class Taskbar {
                     mLauncher.waitForSystemLauncherObject(TASKBAR_RES_ID),
                     getAllAppsButtonSelector()));
 
+            return getAllApps();
+        }
+    }
+
+    /** Returns {@link TaskbarAllApps} if it is open, otherwise fails. */
+    public TaskbarAllApps getAllApps() {
+        try (LauncherInstrumentation.Closable c = mLauncher.addContextLayer(
+                "want to get taskbar all apps object")) {
             return new TaskbarAllApps(mLauncher);
         }
     }