* Fixed https://github.com/google/gson/issues/1310
Also renamed VersionUtils to more readable abstraction JavaVersion
Added support for debian naming convention
Using min supported version (6) as the default if JDK version can't be figured out
* Moved JavaVersion to an internal package
* Simplified access of getSimpleName
instead of calling getClass.getSimpleName() that will check too many conditions inside , we can make it as final String and use it directly.
* Simplified access of getSimpleName
making string as static
* Simplified access of getSimpleName
Code Review changes
- The cache interface has only one implementation. Drop the interface; we can add it back later if necessary.
- The DefaultTypeAdapters class contains one member class. Just make that a top-level class.
