Enable app handle on foldables

The resource config_enableAppHandle that was supposed to be used before
was not very practical. Since there wasn't an overlay config common to
all large screens (or at least foldble devices), it was impractial to
override the resource on all the required devices, especially non-pixels.
This change ensures that the feature reaches all foldable devices.

Bug: 377689543
Test: Manual, app handle shows on foldable
Flag: com.android.window.flags.universal_resizable_by_default
Change-Id: Idb52cb3b0e0f7c6b5a3a222dbe5fd637d406b145