target/androidassistant: Fix Logcat poller creation
target/androidassistant: Fix Logcat poller creation

Threads cannot be restarted therfore we need to create a new polling
thread for each time the poller is started.

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