Fix Schema errors

* Load schemas as category dependency.
* Log category button click immediately.
* Fix diff-prev-or-next.
* Log fontchanger events immediately.
* Do not record font-size, but only the event that
font-size has been changed.

Bug: T78359
Change-Id: I1638e44b1947c0af59d672cb8bc76c22949b567d
Merge "Fix Schema errors"