fix: Fix focus(..) on iOS (#2220)

package/ios/CameraView+Focus.swift

@@ -12,7 +12,8 @@ import Foundation
 extension CameraView {
   func focus(point: CGPoint, promise: Promise) {
     withPromise(promise) {
-      try cameraSession.focus(point: point)
+      let normalized = previewView.captureDevicePointConverted(fromLayerPoint: point)
+      try cameraSession.focus(point: normalized)
       return nil
     }
   }

package/ios/Core/CameraSession+Focus.swift

@@ -21,6 +21,8 @@ extension CameraSession {
       throw CameraError.device(DeviceError.focusNotSupported)
     }
 
+    ReactLogger.log(level: .info, message: "Focusing (\(point.x), \(point.y))...")
+
     do {
       try device.lockForConfiguration()
       defer {