Make async calls work

Summary:
JSCallInvoker requires a `std::weak_ptr<Instance>` to create. In our C++, `CatalystInstance` is responsible for creating this `Instance` object. This `CatalystInstance` C++ initialization is separate from the `TurboModuleManager` C++ initialization. Therefore, in this diff, I made `CatalystInstance` responsible for creating the `JSCallInvoker`. It then exposes the `JSCallInvoker` using a hybrid class called `JSCallInvokerHolder`, which contains a `std::shared_ptr<JSCallInvoker>` member variable. Using `CatalystInstance.getJSCallInvokerHolder()` in TurboModuleManager.java, we get a handle to this hybrid container. Then, we pass it this hybrid object to `TurboModuleManager::initHybrid`, which retrieves the `std::shared_ptr<JSCallInvoker>` from the `JavaJSCallInvokerHandler`.

There were a few cyclic dependencies, so I had to break down the buck targets:
- `CatalystInstanceImpl.java` depends on `JSCallInvokerHolderImpl.java`, and `TurboModuleManager.java` depends on classes that are packaged with `CatalystInstanceImpl.java`. So, I had to put `JSCallInvokerHolderImpl.java` in its own buck target.
- `CatalystInstance.cpp` depends on `JavaJSCallInvokerHolder.cpp`, and `TurboModuleManager.cpp` depends on classes that are build with `CatalystInstance.cpp`. So, I had to put `JavaJSCallInvokerHolder.cpp` in its own buck target. To make things simpler, I also moved `JSCallInvoker.{cpp,h}` files into the same buck target as `JavaJSCallInvokerHolder.{cpp,h}`.

I think these steps should be enough to create the TurboModuleManager without needing a bridge:
1. Make `JSCallInvoker` an abstract base class.
2. On Android, create another derived class of `JSCallInvoker` that doesn't depend on Instance.
3. Create `JavaJSCallInvokerHolder` using an instance of this new class somewhere in C++.
4. Pass this instance of `JavaJSCallInvokerHolder` to Java and use it to create/instatiate `TurboModuleManager`.

Regarding steps 1 and 2, we can also make JSCallInvoker accept a lambda.

Reviewed By: mdvacca

Differential Revision: D15055511

fbshipit-source-id: 0ad72a86599819ec35d421dbee7e140959a26ab6

ReactAndroid/src/main/java/com/facebook/react/bridge/CatalystInstanceImpl.java

@@ -24,6 +24,7 @@ import com.facebook.react.bridge.queue.ReactQueueConfigurationSpec;
 import com.facebook.react.common.ReactConstants;
 import com.facebook.react.common.annotations.VisibleForTesting;
 import com.facebook.react.module.annotations.ReactModule;
+import com.facebook.react.turbomodule.core.JSCallInvokerHolderImpl;
 import com.facebook.systrace.Systrace;
 import com.facebook.systrace.TraceListener;
 import java.lang.annotation.Annotation;
@@ -99,6 +100,7 @@ public class CatalystInstanceImpl implements CatalystInstance {
   // C++ parts
   private final HybridData mHybridData;
   private native static HybridData initHybrid();
+  public native JSCallInvokerHolderImpl getJSCallInvokerHolder();
 
   private CatalystInstanceImpl(
       final ReactQueueConfigurationSpec reactQueueConfigurationSpec,