Support React Native New Architecture

[CHOIMINSEOK]

@kmsbernard and I have updated react-native-code-push to support the new architecture of React Native. We believe the best way to deploy these updates is through this main repository, and we are submitting this pull request to synchronize the following changes with the upstream master branch. Please let us know if you are open to new contributions. We are also committed to maintaining this code going forward.

Changes included in this pull request:

1. Support for the new architecture on Android and iOS

• Android:
  • The CodePush implementation relies on React Native’s internals. In the new architecture, the JsBundleLoader is managed by ReactHostDelegate. Replace the JsBundleLoader in ReactHostDelegate using reflection when new architecture is on. Most of the relevant changes can be found in this commit.
  • When using the new architecture on Android, ReactHost is instantiated with ReactNativeHost via the getDefaultReactHost helper function. This could result in redundant CodePush instances during a CodePush restart. To address this, we have provided guidance to initialize PackageList only once during the application’s lifetime. 41f0e1b
• iOS:
  • No additional changes are required for the new architecture on iOS.

2. Fix for E2E test scripts to support the new architecture

• update test template app version to 0.76.5

[CHOIMINSEOK]

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