[android] Support new arch

Credits to @CHOIMINSEOK and @kmsbernard for their PR on the original repo microsoft/react-native-code-push#2792

Author: Minishlink

android/app/build.gradle

@@ -1,5 +1,13 @@
+def isNewArchitectureEnabled() {
+  return rootProject.hasProperty("newArchEnabled") && rootProject.getProperty("newArchEnabled") == "true"
+}
+
 apply plugin: "com.android.library"
 
+if (isNewArchitectureEnabled()) {
+  apply plugin: "com.facebook.react"
+}
+
 def getExtOrDefault(name) {
   return rootProject.ext.has(name) ? rootProject.ext.get(name) : project.properties["CodePush_" + name]
 }
@@ -33,6 +41,7 @@ android {
   defaultConfig {
     minSdkVersion getExtOrIntegerDefault("minSdkVersion")
     targetSdkVersion getExtOrIntegerDefault("targetSdkVersion")
+    buildConfigField "boolean", "IS_NEW_ARCHITECTURE_ENABLED", isNewArchitectureEnabled().toString()
 
     consumerProguardFiles 'proguard-rules.pro'
   }

android/app/src/main/java/com/appzung/codepush/react/CodePush.java

@@ -4,6 +4,7 @@
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 
+import com.facebook.react.ReactHost;
 import com.facebook.react.ReactInstanceManager;
 import com.facebook.react.ReactPackage;
 import com.facebook.react.bridge.NativeModule;
@@ -43,6 +44,9 @@ public class CodePush implements ReactPackage {
     private static String mPublicKey;
 
     private static ReactInstanceHolder mReactInstanceHolder;
+
+    private static ReactHostHolder mReactHostHolder;
+
     private static CodePush mCurrentInstance;
 
     public static String getServiceUrl() {
@@ -363,6 +367,18 @@ static ReactInstanceManager getReactInstanceManager() {
         return mReactInstanceHolder.getReactInstanceManager();
     }
 
+    public static void setReactHost(ReactHostHolder reactHostHolder) {
+        mReactHostHolder = reactHostHolder;
+    }
+
+    static ReactHost getReactHost() {
+        if (mReactHostHolder == null) {
+            return null;
+        }
+
+        return mReactHostHolder.getReactHost();
+    }
+
     @Override
     public List<NativeModule> createNativeModules(ReactApplicationContext reactApplicationContext) {
         CodePushNativeModule codePushModule = new CodePushNativeModule(reactApplicationContext, this, mUpdateManager, mTelemetryManager, mSettingsManager);