Add SerialTapGestureRecognizer (#83082)

This gesture recognizer can be used to recognize the classic
"onclick" behavior, where each tap in a series fires an event
with an incrementing "count" of how many taps have occurred
in series. This can in turn be used to build widgets that respond
to both tap and double-tap, or for widgets like the YouTube TV
player, where each subsequent tap in a series of >2 taps adjusts
the playhead another 15 seconds.

Fixes https://github.com/flutter/flutter/issues/81657