Add more logging for falsing.

Makes the FalsingManager slightly less stateful (passing the
interaction type directly to the classifiers as needed). It also
includes more logging than we had before, listing all the failed
classifiers for a gesture, along with the HistoryTracker's
belief and confidence.

Logs are now delayed one gesture. Instead of immediately logging when
a falsing call is made, it waits until the gesture is marked as
complete. This confers two advantages:

1) If multiple calls to #isFalseGesture (and similar) are made, we
   don't log multiple times. We only log the result once.

2) It allows us to log the effects on the HistoryTracker, as that only
   updates itself when the gesture is marked as completed.

Bug: 172655679
Test: atest SystemUITests && manual
Change-Id: I653ac2abb03a91ff000b46075e58137b04226023