IInputMethod#startInput() is a hot-spot where we keep adding new
parameters recently. Introducing a dedicated parameter object would
allow us to add further parameters with fewer lines of changes.
This CL also renames
InputMethod#dispatchStartInputWithToken
to
InputMethod#dispatchStartInput
for consistency.
This is a mechanical refactoring. There should be no developer
observable behavior change.
Bug: 234882948
Test: presubmit
Change-Id: I4a6af9a47db04335921a7d14efe91bfeff25c56d
bb00fe959a