Add recents to MANAGE_KEY_GESTURES protection level

QuickStep launcher will call InputManager#[un]registerKeyGestureEventListener for key events.

Notes: In the long term, we should restrict the key gesture event that the recents holder can listen to.

Bug: 406452076
Test: mp droid
Flag: com.android.hardware.input.manage_key_gestures
Change-Id: I7cd1eca694b01322eba6af072327dfcfdb2b5b35