Remove ReactNative/Flipper Integration (#40935)

Summary:
Pull Request resolved: facebook/react-native#40935

This is scheduled to land in 0.74, so I'm removed the native integration as this is not needed anymore.
The only thing I left is a stub class to ease the migration out of `ReactNativeFlipper`.

Changelog:
[Android] [Removed] - Remove ReactNative/Flipper Integration

Reviewed By: mdvacca, huntie, cipolleschi

Differential Revision: D50259817

fbshipit-source-id: 28427425340896635607202cd78936f6030e78e0

Original-Commit: facebook/react-native@171a479

template/template/android/app/build.gradle

@@ -107,7 +107,6 @@ android {
 dependencies {
  // The version of react-native is set by the React Native Gradle Plugin
  implementation("com.facebook.react:react-android")
- implementation("com.facebook.react:flipper-integration")
 
  if (hermesEnabled.toBoolean()) {
  implementation("com.facebook.react:hermes-android")

template/template/android/app/src/main/java/com/helloworld/MainApplication.kt

@@ -10,7 +10,6 @@ import com.facebook.react.common.annotations.UnstableReactNativeAPI
 import com.facebook.react.defaults.DefaultNewArchitectureEntryPoint.load
 import com.facebook.react.defaults.DefaultReactHost
 import com.facebook.react.defaults.DefaultReactNativeHost
-import com.facebook.react.flipper.ReactNativeFlipper
 import com.facebook.soloader.SoLoader
 
 @UnstableReactNativeAPI
@@ -47,6 +46,5 @@ class MainApplication : Application(), ReactApplication {
  // If you opted-in for the New Architecture, we load the native entry point for this app.
  load()
  }
- ReactNativeFlipper.initializeFlipper(this, reactNativeHost.reactInstanceManager)
  }
 }