[CHORE] Only run Flipper in debug via MainApplication is debug (#2347)

* Only run Flipper in debug via MainApplication is debug

* ReactNativeFlipper package rename + gradle bump

android/app/src/debug/AndroidManifest.xml

@@ -1,8 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools">
+    xmlns:tools="http://schemas.android.com/tools"
+    package="chat.rocket.reactnative">
+
+    <application
+        android:name=".MainDebugApplication"
+        tools:ignore="GoogleAppIndexingWarning"
+        tools:replace="android:name"
+        tools:targetApi="28" />
 
     <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
-
-    <application tools:targetApi="28" tools:ignore="GoogleAppIndexingWarning" />
 </manifest>

android/app/src/debug/java/chat/rocket/reactnative/MainDebugApplication.java

@@ -0,0 +1,25 @@
+package chat.rocket.reactnative;
+
+import android.content.Context;
+
+import com.facebook.react.ReactInstanceManager;
+
+public class MainDebugApplication extends MainApplication  {
+
+  @Override
+  public void onCreate() {
+    super.onCreate();
+    initializeFlipper(this, getReactNativeHost().getReactInstanceManager());
+  }
+
+  /**
+   * Loads Flipper in React Native templates. Call this in the onCreate method with something like
+   * initializeFlipper(this, getReactNativeHost().getReactInstanceManager());
+   *
+   * @param context
+   * @param reactInstanceManager
+   */
+  private static void initializeFlipper(Context context, ReactInstanceManager reactInstanceManager) {
+    ReactNativeFlipper.initializeFlipper(context, reactInstanceManager);
+  }
+}

android/app/src/debug/java/chat/rocket/reactnative/ReactNativeFlipper.java

@@ -4,7 +4,7 @@
  * <p>This source code is licensed under the MIT license found in the LICENSE file in the root
  * directory of this source tree.
  */
-package com.rndiffapp;
+package chat.rocket.reactnative;
 import android.content.Context;
 import com.facebook.flipper.android.AndroidFlipperClient;
 import com.facebook.flipper.android.utils.FlipperUtils;

android/app/src/main/java/chat/rocket/reactnative/MainApplication.java

@@ -81,38 +81,6 @@ public class MainApplication extends Application implements ReactApplication, IN
   public void onCreate() {
     super.onCreate();
     SoLoader.init(this, /* native exopackage */ false);
-    initializeFlipper(this, getReactNativeHost().getReactInstanceManager());
-  }
-
-  /**
-   * Loads Flipper in React Native templates. Call this in the onCreate method with something like
-   * initializeFlipper(this, getReactNativeHost().getReactInstanceManager());
-   *
-   * @param context
-   * @param reactInstanceManager
-   */
-  private static void initializeFlipper(
-      Context context, ReactInstanceManager reactInstanceManager) {
-    if (BuildConfig.DEBUG) {
-      try {
-        /*
-         We use reflection here to pick up the class that initializes Flipper,
-        since Flipper library is not available in release mode
-        */
-        Class<?> aClass = Class.forName("chat.rocket.reactnative");
-        aClass
-            .getMethod("initializeFlipper", Context.class, ReactInstanceManager.class)
-            .invoke(null, context, reactInstanceManager);
-      } catch (ClassNotFoundException e) {
-        e.printStackTrace();
-      } catch (NoSuchMethodException e) {
-        e.printStackTrace();
-      } catch (IllegalAccessException e) {
-        e.printStackTrace();
-      } catch (InvocationTargetException e) {
-        e.printStackTrace();
-      }
-    }
   }
 
   @Override

android/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.2-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.3-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists