[CD Cursor] Add topology aware window aconfig flag

This flag will be used for topology-aware InputConfig flag. InputConfig
flag will be added to windows to opt-in to receive the cross-display
gestures.

Bug: 401220484
Test: presubmit
Flag: EXEMPT introducing new flag
Change-Id: Ibfaec9985d14cc37c8b7a2495657e336b5d130e0