Use Tracker to track number of tasks in LocalSimulator

**Describe the feature you'd like**
Currently, the Tracker counts the number of on-demand tasks, but not LocalSimulator tasks. For example
```python
from braket.aws import AwsDevice
from braket.circuits import Circuit
from braket.tracking import Tracker

circ = Circuit().h(0).cnot(0,1)
device = AwsDevice("arn:aws:braket:::device/quantum-simulator/amazon/sv1")
with Tracker() as tracker:
task = device.run(circ, shots=1000).result()

print(tracker.quantum_tasks_statistics())
>> {'arn:aws:braket:::device/quantum-simulator/amazon/sv1':
{'shots': 1000,
'tasks': {'COMPLETED': 1},
'execution_duration': datetime.timedelta(microseconds=4000),
'billed_execution_duration': datetime.timedelta(seconds=3)}}

print(tracker.simulator_tasks_cost())
>> $0.00375
```
The proposal is to add this functionality to track task counts on local simulator like this:
```python
from braket.aws import AwsDevice
from braket.circuits import Circuit
from braket.tracking import Tracker
from braket.devices import LocalSimulator

circ = Circuit().h(0).cnot(0,1)
device = LocalSimulator()
with Tracker() as tracker:
task = device.run(circ, shots=1000).result()

print(tracker.quantum_tasks_statistics())
>> {'braket:local/simulator':
{'shots': 1000,
'tasks': {'COMPLETED': 1},
'execution_duration': datetime.timedelta(microseconds=4000),
'billed_execution_duration': None}}

print(tracker.simulator_tasks_cost())
>> $0
```