Fix wrong comments in DragResizeInputListener

Geometry updates were used to signal a complete cycle of resize
handling, and the readiness of taking the next batch of input events for
handling. However, it's not guaranteed there will be a gemoetry update
for all input events we handle, so we changed the way we handle batched
input events to be Choreographer based, but we left the incorrect
comment until now.

Bug: 239973193
Test: Builds.
Change-Id: I171d0403ff5fbc406b1de33019d0a1efbd8dfc09