Content proposal based on used crypto provider

[kruegers]

Each provider supports a certain number of algorithms in different configurations. Take the Cipher class of the SunJCE Provider for instance (). If AES is taken as a cipher, only the padding schemes NoPadding, PKCS5Padding, ISO10126Padding are allowed. If the user types cipher.getInstance("AES/CBC/ content proposal/code completion may (only) show the allowed padding schemes to support the developer.

Currently blocked by #191.