This file is indexed.

/usr/lib/android-sdk/build-tools/debian/mainDexClasses.rules is in dalvik-exchange 7.0.0+r33-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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  -keep public class * extends android.app.Instrumentation {
    <init>();
  }
  -keep public class * extends android.app.Application {
    <init>();
    void attachBaseContext(android.content.Context);
  }
  -keep public class * extends android.app.Activity {
    <init>();
  }
  -keep public class * extends android.app.Service {
    <init>();
  }
  -keep public class * extends android.content.ContentProvider {
   <init>();
  }
  -keep public class * extends android.content.BroadcastReceiver {
   <init>();
  }
  -keep public class * extends android.app.backup.BackupAgent {
   <init>();
  }
# We need to keep all annotation classes because proguard does not trace annotation attribute
# it just filter the annotation attributes according to annotation classes it already kept.
  -keep public class * extends java.lang.annotation.Annotation {
   *;
  }