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/JImageProxy.h

@@ -9,15 +9,18 @@
 
 namespace vision {
 
-struct JImageProxy : public facebook::jni::JavaClass<JImageProxy> {
+using namespace facebook;
+using namespace jni;
+
+struct JImageProxy : public JavaClass<JImageProxy> {
   static constexpr auto kJavaDescriptor = "Landroidx/camera/core/ImageProxy;";
 
  public:
-  int getWidth();
-  int getHeight();
-  bool getIsValid();
-  int getPlanesCount();
-  int getBytesPerRow();
+  int getWidth() const;
+  int getHeight() const;
+  bool getIsValid() const;
+  int getPlanesCount() const;
+  int getBytesPerRow() const;
   void close();
 };