Move properties to end of interpreters' classes definitions

Iir filter interpreter constructs properties via initializer list.
They in turn reference histories_ map, which is a member of iir filter
interpreter an should be constructed before any of the properties.

Move properties to the end of classes definions to prevent similar
problems in the future.

BUG=None
TEST=FEATURES="test" emerge-brya gestures; test manually on Redrix

Change-Id: I115509ae7b9a1b9fa0910f6ffea4f22a83660267
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/gestures/+/3763900
Reviewed-by: Sean O'Brien <seobrien@chromium.org>
Commit-Queue: Angela Czubak <aczubak@google.com>
Tested-by: Angela Czubak <aczubak@google.com>
17 files changed