perf: Remove FrameProcessorPlugin HybridClass (#467)

* Rename `JImageProxyHostObject` -> `FrameHostObject`

* `FrameProcessorPlugin` -> `JFrameProcessorPlugin` 1/2

* `FrameProcessorPlugin` -> `JFrameProcessorPlugin` 2/2

* Make `const`

* Make `getName()` instance based

* Update JFrameProcessorPlugin.h

* Update JImageProxy.h

* `T`

* T

* Remove default ctor

* Use `TSelf` again

* Return `local_ref<CameraView*>` instead of `CameraView*`

* Make `findCameraViewById` return a raw pointer again...

* Extract `setFrameProcessor` and `unsetFrameProcessor`

* Use `global_ref`

* Use `static_cast` for `FrameHostObject`

* Update FrameProcessorRuntimeManager.cpp

* Fix reference lint error

* linelength

* Fix `unsetFrameProcessor` call

android/src/main/cpp/java-bindings/JFrameProcessorPlugin.cpp

@@ -0,0 +1,30 @@
+//
+// Created by Marc Rousavy on 29.09.21.
+//
+
+#include "JFrameProcessorPlugin.h"
+
+#include <jni.h>
+#include <fbjni/fbjni.h>
+
+namespace vision {
+
+using namespace facebook;
+using namespace jni;
+
+using TCallback = jobject(alias_ref<JImageProxy::javaobject>, alias_ref<JArrayClass<jobject>>);
+
+local_ref<jobject> JFrameProcessorPlugin::callback(alias_ref<JImageProxy::javaobject> image,
+                                                   alias_ref<JArrayClass<jobject>> params) const {
+  auto callbackMethod = getClass()->getMethod<TCallback>("callback");
+
+  auto result = callbackMethod(self(), image, params);
+  return make_local(result);
+}
+
+std::string JFrameProcessorPlugin::getName() const {
+  auto getNameMethod = getClass()->getMethod<jstring()>("getName");
+  return getNameMethod(self())->toStdString();
+}
+
+} // namespace vision