By Dan Levine SAN FRANCISCO (Reuters) – Four technology companies, including Apple and Google , have resumed mediation talks with tech workers in a high-profile lawsuit over hiring practices in Silicon Valley, according to a court filing. Plaintiffs accused Apple, Google, Intel and Adobe of conspiring to avoid poaching each others employees. District Judge Lucy Koh in San Jose, California rejected a proposed $324.5 million settlement in the class action case, saying it was too low. In the court filing on Wednesday, both sides said they had resumed mediation with a retired judge but provided no additional details on the talks.