Starts capturing and drawing preview frames to the screen. Preview will not actually start until a surface is supplied with Camera.SetPreviewDisplay(Android.Views.ISurfaceHolder) or Camera.SetPreviewTexture(Android.Graphics.SurfaceTexture).
If Camera.SetPreviewCallback(.IPreviewCallback), Camera.SetOneShotPreviewCallback(.IPreviewCallback), or Camera.SetPreviewCallbackWithBuffer(.IPreviewCallback) were called, NoType:android/hardware/Camera$PreviewCallback;Href=../../../reference/android/hardware/Camera.PreviewCallback.html#onPreviewFrame(byte[], android.hardware.Camera) will be called when preview data becomes available.