Update dependency com.google.devtools.ksp:symbol-processing-api to v1.9.21-1.0.16

[juul-mobile-bot]

This PR contains the following updates:

Package	Type	Update	Change
com.google.devtools.ksp:symbol-processing-api (source)	dependencies	patch	1.9.21-1.0.15 -> 1.9.21-1.0.16

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[!WARNING] Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

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Release Notes

google/ksp (com.google.devtools.ksp:symbol-processing-api)

### [`v1.9.21-1.0.16`](https://togithub.com/google/ksp/releases/tag/1.9.21-1.0.16) [Compare Source](https://togithub.com/google/ksp/compare/1.9.21-1.0.15...1.9.21-1.0.16) ##### Issue fixed [#​1653](https://togithub.com/google/ksp/issues/1653) KSP 1.9.21-1.0.15 leaking memory and causing OOMs

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Configuration

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♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

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This PR has been generated by Renovate Bot.

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Test Results

  5 files  ±0    5 suites  ±0   23s :stopwatch: ±0s 17 tests ±0  17 :heavy_check_mark: ±0  0 :zzz: ±0  0 :x: ±0  19 runs  ±0  19 :heavy_check_mark: ±0  0 :zzz: ±0  0 :x: ±0 

Results for commit d517f08a. ± Comparison against base commit ef81aca5.