Error cannot find symbol import android.support.v4.app.NotificationCompat when run ./gradlew assembleRelease

Bug report

• Reproduced on:
• Android

Description

Steps to Reproduce

Versions

- Callkeep: 4.0.1
- React Native: 0.63.4
- Android:
- Phone model: 

Logs

run ./gradlew assembleRelease

node_modules/react-native-callkeep/android/src/main/java/io/wazo/callkeep/VoiceConnectionService.java:36: error: cannot find symbol
import android.support.v4.app.NotificationCompat;
                             ^
  symbol:   class NotificationCompat
  location: package android.support.v4.app
/node_modules/react-native-callkeep/android/src/main/java/io/wazo/callkeep/VoiceConnectionService.java:237: error: package NotificationCompat does not exist
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);
                          ^
/node_modules/react-native-callkeep/android/src/main/java/io/wazo/callkeep/VoiceConnectionService.java:237: error: package NotificationCompat does not exist
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);

Start by running ./gradlew assembleRelease and inspect the reported import and usage in android/src/main/java/io/wazo/callkeep/VoiceConnectionService.java. Trace why NotificationCompat is unavailable in the release build, then verify that the command completes without the cannot-find-symbol errors.