Revert "al-ov: Use F4 to toggle Overview"

This reverts commit b47668154f379959ab0bf303e246afdc06becf37.

Reason for revert: Potential culprit for b/360959795- verifying through ABTD before revert submission. This is part of the standard investigation process, and does not mean your CL will be reverted.

Change-Id: I5c7c94d458acfd6688ed4f927d75870231d23458
diff --git a/services/core/java/com/android/server/policy/PhoneWindowManager.java b/services/core/java/com/android/server/policy/PhoneWindowManager.java
index 9b9d1cc..aa56e8d 100644
--- a/services/core/java/com/android/server/policy/PhoneWindowManager.java
+++ b/services/core/java/com/android/server/policy/PhoneWindowManager.java
@@ -3416,7 +3416,7 @@
                 return handleHomeShortcuts(focusedToken, event);
             case KeyEvent.KEYCODE_RECENT_APPS:
                 if (firstDown) {
-                    toggleRecentApps();
+                    showRecentApps(false /* triggeredFromAltTab */);
                     notifyKeyGestureCompleted(event,
                             KeyGestureEvent.KEY_GESTURE_TYPE_RECENT_APPS);
                 }