Error: package expo.loaders.provider.interfaces does not exist (update from SDK 36 to 37)

🐛 Bug Report

Environment

Expo CLI 3.15.5 environment info:
    System:
      OS: Linux 5.3 Pop!_OS 18.04 LTS
      Shell: 5.4.2 - /usr/bin/zsh
    Binaries:
      Node: 10.19.0 - /usr/bin/node
      Yarn: 1.22.4 - /usr/bin/yarn
      npm: 6.13.4 - /usr/bin/npm
    npmPackages:
      expo: ^37.0.0 => 37.0.3 
      react: 16.9.0 => 16.9.0 
      react-native: https://github.com/expo/react-native/archive/sdk-37.0.0.tar.gz => 0.61.4 
      react-navigation: ^3.1.4 => 3.11.1 

Project is in ExpoKit already updated to SDK 37 also

Steps to Reproduce

Update from SDK 36 to SDK 37

Expected Behavior

Android build without issues

Actual Behavior

android/app/src/main/java/host/exp/exponent/MainApplication.java:10: error: package expo.loaders.provider.interfaces does not exist
import expo.loaders.provider.interfaces.AppLoaderPackagesProviderInterface;
                                       ^
android/app/src/main/java/host/exp/exponent/MainApplication.java:27: error: cannot find symbol
public class MainApplication extends ExpoApplication implements AppLoaderPackagesProviderInterface<ReactPackage> {
                                                                ^
  symbol: class AppLoaderPackagesProviderInterface
2 errors 

[Andrea-Arguello]

Solved by changing the import MainApplication.java of my project

- import expo.loaders.provider.interfaces.AppLoaderPackagesProviderInterface;
+ import org.unimodules.apploader.AppLoaderPackagesProviderInterface;

[Andrea-Arguello]

Regarding my previous comment, this is something I noticed that was deleted from the MainApplication.java from SDK 36 to SDK 37. So, this is either a bug that needs to be fixed, or intentional and needs to be added to the upgrading documentation, as noted on #7574 . Therefore, I am leaving this issue open.