flutter_callkit_incoming/android/consumer-rules.pro

#flutter_callkit_incoming
# Issue: https://github.com/hiennguyen92/flutter_callkit_incoming/issues/171
-keep class com.hiennv.flutter_callkit_incoming.** { *; }
-keep class com.fasterxml.** { *; }
-keep class org.codehaus.** { *; }