Two Covid-19 infections newly detected by Hong Kong mass testing were among the 12 cases confirmed on Friday, taking the total discovered so far under the screening scheme to eight.Health officials revealed that a third of the daily tally was uncovered through community-wide screening – two on Friday and another two from the previous day counting towards the latest figure.Seven of the 12 confirmed cases were imported, pushing the city’s total to 4,850, with 94 related deaths.Six Covid-19 cases…