Fix omit_obvious_local_variable_types lint in CameraX test

Author: Ludwig Bolling

packages/camera/camera_android_camerax/test/android_camera_camerax_test.dart

@@ -3921,8 +3921,8 @@ void main() {
       final mockImageCapture = MockImageCapture();
       final mockNewImageCapture = MockImageCapture();
       const int defaultTargetRotation = Surface.rotation90;
-      const int jpegQuality = 73;
-      const int cameraId = 9;
+      const jpegQuality = 73;
+      const cameraId = 9;
       int? actualTargetRotation;
       int? actualJpegQuality;
 
@@ -3976,8 +3976,8 @@ void main() {
       final mockDeviceOrientationManager = MockDeviceOrientationManager();
       final mockNewImageCapture = MockImageCapture();
       const int lockedTargetRotation = Surface.rotation270;
-      const int jpegQuality = 64;
-      const int cameraId = 11;
+      const jpegQuality = 64;
+      const cameraId = 11;
       int? actualTargetRotation;
       int? actualJpegQuality;