feat: Add console logging support for Frame Processors (#297)

* Try to log to console via runOnJS

* Call `console.log`

* Create custom `VisionCameraScheduler`

* Fix scheduler call

* Call with this

* Fix console setting

* Move J---- to `java-bindings`

* c++ style

* Android: 1/2 Create custom Scheduler

* Android: 2/2 Use custom Scheduler

* Don't use `runOnJS`, use `__callAsync` directly

ios/Frame Processor/VisionCameraScheduler.mm

@@ -0,0 +1,39 @@
+//
+//  VisionCameraScheduler.mm
+//  VisionCamera
+//
+//  Created by Marc Rousavy on 23.07.21.
+//  Copyright © 2021 mrousavy. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import "VisionCameraScheduler.h"
+
+#import <React-callinvoker/ReactCommon/CallInvoker.h>
+
+// Forward declarations for the Swift classes
+__attribute__((objc_runtime_name("_TtC12VisionCamera12CameraQueues")))
+@interface CameraQueues : NSObject
+@property (nonatomic, class, readonly, strong) dispatch_queue_t _Nonnull frameProcessorQueue;
+@end
+
+namespace vision {
+  
+using namespace facebook;
+  
+VisionCameraScheduler::VisionCameraScheduler(std::shared_ptr<react::CallInvoker> jsInvoker) {
+  this->jsCallInvoker_ = jsInvoker;
+}
+
+// does not schedule on UI thread but rather on Frame Processor Thread
+void VisionCameraScheduler::scheduleOnUI(std::function<void()> job) {
+  dispatch_async(CameraQueues.frameProcessorQueue, ^{
+    job();
+  });
+}
+
+VisionCameraScheduler::~VisionCameraScheduler(){
+}
+  
+  
+} // namespace vision