[api] configurable keepalive interval

[rwrozelle]

What does this implement/fix?

Adds the attribute server_keepalive_interval to HelloResponse and use it to update the connections _keep_alive_interval, after HelloResponse. This allows the server(device) to define the interval.

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Code quality improvements to existing code or addition of tests
• Other

Related issue or feature (if applicable):

• fixes

Pull request in esphome (if applicable):

• [api] configurable keepalive intervals esphome#13619

Pull request in esphome-docs with documentation (if applicable):

• [api] docs configurable keepalive intervals esphome-docs#6005

Checklist:

• The code change is tested and works locally.
• If api.proto was modified, a linked pull request has been made to esphome with the same changes.
• Tests have been added to verify that the new code works (under tests/ folder).
  Need help on updating tests, not sure how they are done.

[codecov]

Codecov Report

❌ Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 99.94%. Comparing base (5717d4a) to head (d7d0c1a).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
aioesphomeapi/connection.py	33.33%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##              main    #1490      +/-   ##
===========================================
- Coverage   100.00%   99.94%   -0.06%     
===========================================
  Files           23       23              
  Lines         3506     3509       +3     
===========================================
+ Hits          3506     3507       +1     
- Misses           0        2       +2     

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[codspeed-hq]

CodSpeed Performance Report

Merging this PR will not alter performance

_{Comparing rwrozelle:api-Configurable-Keep-Alive-Timeout (d7d0c1a) with main (5717d4a)¹}

Summary

✅ 11 untouched benchmarks

Footnotes

1. No successful run was found on main (284b33b) during the generation of this report, so 5717d4a was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩