js: fixing errors found by testing: encrypt/decrypt

• Key.js: Error code for wrong parameter in createKey should be "PARAM_WRONG"
• Helpers.js: The property openpgpjs-like Objects were checked for in toKeyIdArray was not defined.
• src/permittedOperations.js: updated more expectations and assumptions for the native API

• new Problems:
  • There seems to be a message size limit of about 21 MB for nativeMessaging, much lower than the documented 4GB.
  • Some bytes are lost with random data in an encrypt-decrypt roundtrip. The culprit is unclear.