workloads/jankbench: Replace errors during decoding
workloads/jankbench: Replace errors during decoding

When running jankbench invalid bytes can be read from the device causing
decoding in the monitor to fail, now replace any invalid sequences.

lisatn/workload-automation,ARM-software/workload-automation,lisatn/workload-automation,ARM-software/workload-automation,setrofim/workload-automation,setrofim/workload-automation,setrofim/workload-automation,setrofim/workload-automation,lisatn/workload-automation,ARM-software/workload-automation,ARM-software/workload-automation,lisatn/workload-automation