Refactor the VirtualSensor API.

Make the virtual sensor callback VirtualDevice-level instead of
VirtualSensor-level. This allows for clients of the API to define a
single callback that takes the sensor as an argument instead of
defining callback per sensor. Also, this allows for mimicking the
HAL APIs for direct channel support, as channel registration and
unregistration are at HAL level and not at sensor level. This is a
nicer solution because the VirtualDevice essentially acts as the
sensor HAL.

In more detail what this CL does:
 - Rename the VirtualSensorCallback and move it to its own file
 - Rename the callback method to onListenersChanged
 - Make VirtualSensor Parcelable so it can be passed to the callback
 - Move the VirtualSensor ownership to VirtualDeviceImpl
 - Make VirtualDevice id avaiable from VirtualSensor.
 - Return a boolean from the internal callbacks indicating success
 - Move the non-CTS VirtualDeviceParamsTest cases to the CTS one

Bug: 266042170
Test: atest VirtualSensorConfigTest
Test: atest SensorControllerTest
Test: atest VirtualDeviceManagerServiceTest

Change-Id: I14127f7a000d84ba41ade6ebda41c95a0c350fc9