custom build.gradle fields are stored in BuildConfig java file after compilation in package root folder.
e.g.
package io.hextree.attacksurface;
/* loaded from: classes.dex */
public final class BuildConfig {
public static final String APPLICATION_ID = "io.hextree.attacksurface";
public static final String BUILD_TYPE = "release";
public static final boolean DEBUG = false;
public static final int VERSION_CODE = 1;
public static final String VERSION_NAME = "1.0";
}