Android: add no metrics flag to emulator to avoid future cli block

```
Consider using the '-metrics-collection' flag to help improve the       ##
##  emulator by sending anonymized usage data. Or use the '-no-metrics'     ##
##  flag to bypass this warning and turn off the metrics collection.        ##
##  In a future release this warning will turn into a one-time blocking     ##
##  prompt to ask for explicit user input regarding metrics collection
```