Swipe from all apps from overview starts on an icon

In some configs, Overview has prediction row, in others hotseat. So
swiping from an icon in either.

Change-Id: I98db3df4f612fcd9d5b7057835c49ca58313210f

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

@@ -531,6 +531,14 @@ public final class LauncherInstrumentation {
         return object;
     }
 
+    @NonNull
+    UiObject2 waitForLauncherObjectByClass(String clazz) {
+        final BySelector selector = getLauncherObjectSelectorByClass(clazz);
+        final UiObject2 object = mDevice.wait(Until.findObject(selector), WAIT_TIME_MS);
+        assertNotNull("Can't find a launcher object; selector: " + selector, object);
+        return object;
+    }
+
     @NonNull
     UiObject2 waitForFallbackLauncherObject(String resName) {
         final BySelector selector = getFallbackLauncherObjectSelector(resName);
@@ -543,6 +551,10 @@ public final class LauncherInstrumentation {
         return By.res(getLauncherPackageName(), resName);
     }
 
+    BySelector getLauncherObjectSelectorByClass(String clazz) {
+        return By.pkg(getLauncherPackageName()).clazz(clazz);
+    }
+
     BySelector getFallbackLauncherObjectSelector(String resName) {
         return By.res(getOverviewPackageName(), resName);
     }

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

@@ -49,11 +49,12 @@ public final class Overview extends BaseOverview {
                 "want to switch from overview to all apps")) {
             verifyActiveContainer();
 
-            // Swipe from the prediction row to the top.
+            // Swipe from an app icon to the top.
             LauncherInstrumentation.log("Overview.switchToAllApps before swipe");
-            final UiObject2 predictionRow = mLauncher.waitForLauncherObject("prediction_row");
+            final UiObject2 appIcon = mLauncher.waitForLauncherObjectByClass(
+                    "android.widget.TextView");
             mLauncher.swipeToState(mLauncher.getDevice().getDisplayWidth() / 2,
-                    predictionRow.getVisibleBounds().centerY(),
+                    appIcon.getVisibleBounds().centerY(),
                     mLauncher.getDevice().getDisplayWidth() / 2,
                     0, 50, ALL_APPS_STATE_ORDINAL);