This converts user options management to a separate
service for use in DI context.
User options are accessed quite early on in installation
process and full-on options management depends on the
database. Prior we have protected from accessing the DB
by setting a hacky $wgUser with 0 id, and relying on the
implementation that it doesn't go into the database to
get the default user options. Now we can't really do that
since DBLoadBalancer is required to instantiate the options
manager. Instead, we redefine the options manager with
a DefaultOptionsManager, that only provides access to
default options and doesn't require DB access.
UserOptionsManager uses PreferencesFactory, however
injecting it will produce a cyclic dependency. The problem
is that we separate options to different kinds, which are
inferred from the PreferencesFactory declaration for those
options (e.g. if it's a radio button in the UI declaration,
the option is of multiselect kind). This is plain wrong,
the dependency should be wise versa. This will be addressed
separately, since it's requires larger refactoring. For now
the PreferencesFactory is obtained on demand. This will be
addressed in a followup.
Bug: T248527
Change-Id: I74917c5eaec184d188911a319895b941ed55ee87
788331c48a