Perf Tune JDK HTTP client.

[g2vinay]

Adds Perf optimizations:

1. Adds Conscrypt. (Required for TLS layer crypto bottlenecks).
2. Adds a Caching Trust Manager. (Required to not spend repetitive time on validating cert that have already been validated.).
3. Adds a Custom SSL Context. (Required to specify high performance ciphers to be used in crypto layer).

[alzimmermsft]

I'd really rather not ship with this as a compile dependency. I'd rather offer guidance on using this to improve performance. This library hasn't shipped in a long time and if any CVEs against it come up we may be stuck.

[github-actions]

Hi @g2vinay. Thank you for your interest in helping to improve the Azure SDK experience and for your contribution. We've noticed that there hasn't been recent engagement on this pull request. If this is still an active work stream, please let us know by pushing some changes or leaving a comment. Otherwise, we'll close this out in 7 days.

[github-actions]

Hi @g2vinay. Thank you for your contribution. Since there hasn't been recent engagement, we're going to close this out. Feel free to respond with a comment containing /reopen if you'd like to continue working on these changes. Please be sure to use the command to reopen or remove the no-recent-activity label; otherwise, this is likely to be closed again with the next cleanup pass.