Revert "Android: Support feedback with variations state"

This reverts commit 68ecb3024bdbd402c364c218333bc9e044e75962.

Reason for revert: Closed tree due to JNI assertion failure

Original change's description:
> Android: Support feedback with variations state
>
> When user file a feedback report, also attach Chrome variations state.
> This would be useful for Chrome developers to reproduce an issue that
> was caused by experiments.
>
> When 'Include system logs' is checked, and the experiment is on, user
> can see 'variations_state' tab in the 'System information' under
> 'View the information we collect'. And it will be uploaded if user
> send the feedback.
>
> On the backend, it will be saved as variations_state.gz, which is a
> gzipped, base64 encoded, encrypted variations state string. A tool at
> http://go/finch-listnr will be used to decrypt the data.
> This is different with desktop implementations where we upload a bin
> file. 2 reasons:
> 1 Any data go through the API will show up in 'System information'.
> So binary data will show as garbled text. Also see the internal cl
> crrev.com/i/7929308, the API addPsbdForSilentFeedback mimeType can
> only be (text/plain, text/html). That's why base64 is used.
> 2 All data is gzipped. We can not control this behavior.
>
> Creates a new static library for 'variations_associated_data' to avoid
> dependency cycle. There is a cycle that is hard to avoid:
> variations_associated_data_android.cc
> (//components/variations:variations) -> variations_command_line.h/cc
> variations_command_line.cc -> field_trial_util.h/cc
> field_trial_util.cc -> //components/variations:variations
> Unless we move all 3 files to //components/variations:variations, it's
> hard to avoid. So move variations_associated_data_android.cc to a new
> target.
>
> Design doc: http://go/finch-listnr-design.
> Related internal cl: http://crrev.com/i/7929308
>
> Test: Tested locally that the uploaded file can be decrypted with dev key.
> Bug: 373470046
> Low-Coverage-Reason: TRIVIAL_CHANGE simple interface definition
> Change-Id: Idb7d3553de65a249a8abe0b4978e07d20ea07e28
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6114490
> Reviewed-by: Richard (Torne) Coles <torne@chromium.org>
> Reviewed-by: Theresa Sullivan <twellington@chromium.org>
> Commit-Queue: Sven Zheng <svenzheng@chromium.org>
> Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1406269}

Bug: 373470046
Change-Id: Id8edc2c62e7683820d3257ff36d07b055ce041e0
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6175329
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Owners-Override: Orin Jaworski <orinj@google.com>
Commit-Queue: Orin Jaworski <orinj@chromium.org>
Auto-Submit: Orin Jaworski <orinj@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1406284}