[C++] Update cpp crypto package to match signed-off specification

[asfimport]

An initial version of crypto package is merged. This Jira updates the crypto code to 

1. conform the signed off specification (wire protocol updates, signature tag creation, AAD support, etc)
2. improve performance by extending cipher lifecycle to file writing/reading - instead of creating cipher on each encrypt/decrypt operation  

Reporter: Gidon Gershinsky / @ggershinsky
Assignee: Gidon Gershinsky / @ggershinsky

PRs and other links:

• GitHub Pull Request #3520

_{Note: This issue was originally created as PARQUET-1517. Please see the migration documentation for further details.}

[asfimport]

Wes McKinney / @wesm:
Issue resolved by pull request 3520
apache/arrow#3520