UseFrontCameraIfAvailable does not work on Android.

[ivoryguard]

Hello.

I found that UseFrontCameraIfAvailable did not work on Android devices.

I inspected github repository sources and found that front camera was always bypassed by code like this;

// We don't use a front facing camera in this sample.
var facing = (Integer)characteristics.Get(CameraCharacteristics.LensFacing);
if (facing != null && facing == (Integer.ValueOf((int)LensFacing.Front)))
{
          continue;
 }

If you implement UseFrontCameraIfAvailable support on Android, it will be best.

In addition, if it is possible to select or set a target camera for previewing, it will be very helpful. Current Android implementation may use first non-front camera.

Best regards.

[kristiandamian]

I added a pull request with a fix for this