Merge "cas: add CAS hal and switch to use hwservice"

private/app_neverallows.te

private/ephemeral_app.te

private/hwservice_contexts

private/platform_app.te

private/priv_app.te

private/service_contexts

private/system_server.te

private/technical_debt.cil

private/untrusted_app_all.te

private/untrusted_v2_app.te

public/attributes

public/domain.te

public/hal_cas.te

public/hwservice.te

public/mediacodec.te

public/mediadrmserver.te

public/mediaextractor.te

public/service.te

vendor/file_contexts

vendor/hal_cas_default.te