Don't subscribe to KEY_GESTURE_TYPE_RECENT_APPS[_SWITCHER] in PhoneWindowManager

KEY_GESTURE_TYPE_RECENT_APPS_SWITCHER & KEY_GESTURE_TYPE_RECENT_APPS_SWITCHER_SWITCHER will be subscribed in the recents app.

Flag: com.android.window.flags.enable_key_gesture_handler_for_recents
Test: atest WmTests:PhoneWindowManagerTests
Bug: 406452076
Change-Id: Idbb8236a335d732c1004dd9bac766c8b0536b88e