Conditionally remove the "Quick fixes", "Bigram suggestions" and
"Usability study mode" options, depending on configuration.
When disabled, have the quick fixes and bigram option become
false if autocorrect is off, and true otherwise.
Also reorder options to bring "Auto correction" above "Show
suggestions".
bug: 3282448
Change-Id: Ib7fd928be417a816ef9e21423a531773069b7468