Introduce com.sun.star.beans.theIntrospection singleton

...deprecating com.sun.star.beans.Introspection (single-instance) service.

Change-Id: Ica2e3a3541c7dcb1aab79222c5abf40d6988c882
Enough to obtain theIntrospection singleton once

Change-Id: I2f786b24590af8cfae6f24ef0367ef51ff97dfb5