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

android/src/main/cpp/java-bindings/JHashMap.h

@@ -0,0 +1,23 @@
+//
+// Created by Marc Rousavy on 25.06.21.
+//
+
+#pragma once
+
+#include <jni.h>
+#include <fbjni/fbjni.h>
+
+
+namespace facebook {
+namespace jni {
+
+// TODO: Remove when fbjni 0.2.3 releases.
+template <typename K = jobject, typename V = jobject>
+struct JHashMap : JavaClass<JHashMap<K, V>, JMap<K, V>> {
+  constexpr static auto kJavaDescriptor = "Ljava/util/HashMap;";
+
+  static local_ref<JHashMap<K, V>> create();
+};
+
+} // namespace jni
+} // namespace facebook