As started in commit 8c83f64f. When Java code does `new JavaPeerType()`, the constructor needs to create a corresponding managed peer instance.
Activity
[Java.Interop] Add JniEnvironment.WithinNewObjectScope.
[Java.Interop] Add JniManagedPeerStates, IJavaPeerable.JniManagedPeer…
[Java.Runtime.Environment] Don't Destroy the JVM by default.
[Java.Runtime.Environment] Don't Destroy the JVM by default. (#65)