Use ListFormatter to join strings

Currently in Settings we are using R.string.join_many_items_first, R.string.join_many_items_middle and R.string.join_many_items_last to manually join strings. The join code is messy and the joined string is incorrect in some languages, so we migrate all string join to just use ListFormatter.getInstance().format().

Bug: b/78248791
Test: robotests
Change-Id: I898339978e6e2027587e28994b0280fa46821fd6
12 files changed