(1) Define a new intent action ACTION_ONE_HANDED_SETTINGS in Settings

to support long-pressed action for One-handed mode tile

Define a new intent action ACTION_ONE_HANDED_SETTINGS in Settings for
showing One-handed mode settings page when long-pressed on One-handed
mode tile

Bug: 201743873
Bug: 202132480
Bug: 207381742

Test: manually test One-handed mode quick settings tile long-pressed
action.
Test: atest SystemUITests

Change-Id: I6becc5761de3d2ccdf2057793068832d886cf338

core/java/android/provider/Settings.java

@@ -268,6 +268,16 @@ public final class Settings {
     /** @hide */
     public static final String EXTRA_NETWORK_TEMPLATE = "network_template";
 
+    /**
+     * Activity Action: Show One-handed mode Settings page.
+     * <p>
+     * Input: Nothing
+     * <p>
+     * Output: Nothing
+     * @hide
+     */
+    public static final String ACTION_ONE_HANDED_SETTINGS =
+            "android.settings.action.ONE_HANDED_SETTINGS";
     /**
      * The return values for {@link Settings.Config#set}
      * @hide

packages/SystemUI/src/com/android/systemui/qs/tiles/OneHandedModeTile.java

@@ -105,8 +105,7 @@ public class OneHandedModeTile extends QSTileImpl<BooleanState> {
 
     @Override
     public Intent getLongClickIntent() {
-        // TODO(b/201743873) define new intent action ACTION_ONE_HANDED_SETTINGS in Settings.
-        return null;
+        return new Intent(Settings.ACTION_ONE_HANDED_SETTINGS);
     }
 
     @Override