Fix coding standards

Problem/Motivation

A scan of the module identifies some coding standards issues:

 ./vendor/bin/phpcs -p --colors --standard=Drupal,DrupalPractice --extensions=php,module,inc,install,test,profile,theme,info,txt,md --ignore=node_modules,vendor ./web/modules/contrib/real_aes
EWE 3 / 3 (100%)



FILE: /var/www/html/web/modules/contrib/real_aes/real_aes.install
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FOUND 1 ERROR AFFECTING 1 LINE
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 1 | ERROR | [x] The PHP open tag must be followed by exactly one blank line
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: /var/www/html/web/modules/contrib/real_aes/README.md
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FOUND 0 ERRORS AND 8 WARNINGS AFFECTING 8 LINES
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 15 | WARNING | Line exceeds 80 characters; contains 81 characters
 29 | WARNING | Line exceeds 80 characters; contains 84 characters
 31 | WARNING | Line exceeds 80 characters; contains 85 characters
 33 | WARNING | Line exceeds 80 characters; contains 87 characters
 42 | WARNING | Line exceeds 80 characters; contains 81 characters
 47 | WARNING | Line exceeds 80 characters; contains 83 characters
 48 | WARNING | Line exceeds 80 characters; contains 88 characters
 49 | WARNING | Line exceeds 80 characters; contains 84 characters
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FILE: /var/www/html/web/modules/contrib/real_aes/src/Plugin/EncryptionMethod/RealAESEncryptionMethod.php
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FOUND 6 ERRORS AND 2 WARNINGS AFFECTING 8 LINES
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  8 | ERROR   | [x] When importing a class with "use", do not include a leading \
  9 | ERROR   | [x] When importing a class with "use", do not include a leading \
 10 | ERROR   | [x] When importing a class with "use", do not include a leading \
 11 | ERROR   | [x] When importing a class with "use", do not include a leading \
 19 | WARNING | [ ] Line exceeds 80 characters; contains 156 characters
 23 | WARNING | [ ] The class short comment should describe what the class does and not simply repeat the class name
 49 | ERROR   | [x] Namespaced classes/interfaces/traits should be referenced with use statements
 64 | ERROR   | [x] Namespaced classes/interfaces/traits should be referenced with use statements
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PHPCBF CAN FIX THE 6 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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