Fixing 'Missing java.lang.ClassValue class' in Android

### Description

I successfully modified Lucene 7.3.0 for using in Android: https://github.com/texophen/lucene-android

The modification includes:
+ Add log feature in org.apache.lucene.LucenePackage
+ Add org.apache.lucene.util.ADClassValue to replace java.lang.ClassValue in JDK 8 (but not available in Android)
+ Modify org.apache.lucene.util.AttributeFactory
```
static final MethodHandle findAttributeImplCtor(Class clazz) {
try {
//org.apache.lucene.LucenePackage.writeLog("AttributeFactory.findAttributeImplCtor() - 1: " + lookup.findConstructor(clazz, NO_ARG_CTOR).toString());
MethodHandle mh = null;
if (lookup.findConstructor(clazz, NO_ARG_CTOR).toString().endsWith("PackedTokenAttributeImpl")) {
mh = lookup.findConstructor(clazz, NO_ARG_CTOR).asType(MethodType.methodType(org.apache.lucene.analysis.tokenattributes.PackedTokenAttributeImpl.class));
} else {
mh = lookup.findConstructor(clazz, NO_ARG_CTOR).asType(NO_ARG_RETURNING_ATTRIBUTEIMPL);
}
//org.apache.lucene.LucenePackage.writeLog("AttributeFactory.findAttributeImplCtor() - 2: " + mh.toString());
return mh;
} catch (NoSuchMethodException | IllegalAccessException e) {
throw new IllegalArgumentException("Cannot lookup accessible no-arg constructor for: " + clazz.getName(), e);
}
}
```

Start by reviewing org.apache.lucene.util.ADClassValue and the changes described for org.apache.lucene.util.AttributeFactory, then compare them with the linked lucene-android modification. Reproduce the missing java.lang.ClassValue problem on Android and inspect org.apache.lucene.LucenePackage for the mentioned logging. Done means Lucene 7.3.0 can run on Android without the missing class error.

Written by the indexing model from the issue text.