correct naming and add comments for test case of custom shortcut.

Bug: 141934188
Change-Id: I69ce5f05214df10e2a376ff68c713efe8874df15

tests/AndroidManifest-common.xml

@@ -62,7 +62,7 @@
                 <action android:name="android.appwidget.action.APPWIDGET_CONFIGURE"/>
             </intent-filter>
         </activity>
-        <activity android:name="com.android.launcher3.testcomponent.ShortcutWidgetConfigActivity">
+        <activity android:name="com.android.launcher3.testcomponent.CustomShortcutConfigActivity">
             <intent-filter>
                 <action android:name="android.intent.action.CREATE_SHORTCUT" />
                 <category android:name="android.intent.category.DEFAULT" />

tests/src/com/android/launcher3/testcomponent/CustomShortcutConfigActivity.java

@@ -27,7 +27,11 @@ import com.android.launcher3.R;
 
 import java.util.UUID;
 
-public class ShortcutWidgetConfigActivity extends BaseTestingActivity {
+/**
+ * A custom shortcut is a 1x1 widget that launches a specific intent when user tap on it.
+ * Custom shortcuts are replaced by deep shortcuts after api 25.
+ */
+public class CustomShortcutConfigActivity extends BaseTestingActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {

tests/src/com/android/launcher3/ui/TaplTestsLauncher3.java

@@ -342,10 +342,17 @@ public class TaplTestsLauncher3 extends AbstractLauncherUiTest {
         }
     }
 
+    /**
+     * Test dragging a custom shortcut to the workspace and launch it.
+     *
+     * A custom shortcut is a 1x1 widget that launches a specific intent when user tap on it.
+     * Custom shortcuts are replaced by deep shortcuts after api 25.
+     */
     @Test
-    public void testDragShortcutWidget() {
+    @PortraitLandscape
+    public void testDragCustomShortcut() {
         mLauncher.getWorkspace().openAllWidgets()
-                .getWidget("com.android.launcher3.testcomponent.ShortcutWidgetConfigActivity")
+                .getWidget("com.android.launcher3.testcomponent.CustomShortcutConfigActivity")
                 .dragToWorkspace();
         mLauncher.getWorkspace().getWorkspaceAppIcon("Shortcut")
                 .launch(getAppPackageName());