Upgrade aes 0.7 -> 0.8

[boxdot]

Now libsignal 0.32 is used, aes can be upgraded to the next version. In
particular, this removes duplicated dependencies.

[codecov]

Codecov Report

Attention: 31 lines in your changes are missing coverage. Please review.

Comparison is base (9af1f42) 3.62% compared to head (5f5577b) 3.64%.
Report is 2 commits behind head on main.

Files	Patch %	Lines
libsignal-service/src/account_manager.rs	0.00%	8 Missing ⚠️
libsignal-service/src/profile_cipher.rs	0.00%	6 Missing ⚠️
libsignal-service/src/provisioning/cipher.rs	0.00%	6 Missing ⚠️
libsignal-service/src/attachment_cipher.rs	0.00%	3 Missing ⚠️
libsignal-service/src/websocket.rs	0.00%	3 Missing ⚠️
libsignal-service/src/cipher.rs	0.00%	2 Missing ⚠️
libsignal-service/src/envelope.rs	0.00%	2 Missing ⚠️
libsignal-service/src/push_service.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##            main    #247      +/-   ##
========================================
+ Coverage   3.62%   3.64%   +0.01%     
========================================
  Files         37      37              
  Lines       2841    2828      -13     
========================================
  Hits         103     103              
+ Misses      2738    2725      -13     

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[rubdos]

Could you comment on the try_into() that happens everywhere? Sounds like these should be using fixed-size arrays from the get-go, instead of dynamic conversions.

I would also suggest we merge #248 before this, then we know whether it is 1.61 compatible.