Use variadic positional parameters for plural install_* methods

Use variadic positional parameters for plural install_* methods

It saves an indent and brackets on the call sites.

Also sort the handlers alphabetically where their order doesn't matter
and split the fallback handlers into a separate call to signify that
their position in the end matters.

(cherry picked from commit 7e587201a4e49c88cfb4a46662d819c3a35b703b)