[Traffic Annotations] Fix sanitized_image_source annotation

The unique_id_hash_code field did not match the annotation's unique_id,
which caused some issues for our buildbots.

TBR=rhalavati@chromium.org

Bug: 1119509
Change-Id: I224b57669717782352c2192416c5fdc817db718e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2367493
Commit-Queue: Nicolas Ouellet-Payeur <nicolaso@chromium.org>
Reviewed-by: Nicolas Ouellet-Payeur <nicolaso@chromium.org>
Cr-Commit-Position: refs/heads/master@{#800222}

tools/traffic_annotation/summary/annotations.xml

@@ -291,7 +291,7 @@ Refer to README.md for content description and update process.
  <item id="safe_browsing_v4_get_hash" hash_code="8561691" type="0" content_hash_code="132435617" os_list="linux,windows" file_path="components/safe_browsing/core/db/v4_get_hash_protocol_manager.cc"/>
  <item id="safe_browsing_v4_update" hash_code="82509217" type="0" content_hash_code="5247849" os_list="linux,windows" file_path="components/safe_browsing/core/db/v4_update_protocol_manager.cc"/>
  <item id="safety_check_update_connectivity" hash_code="137724067" type="0" content_hash_code="30977369" os_list="linux,windows" file_path="components/safety_check/update_check_helper.cc"/>
- <item id="sanitized_image_source" hash_code="82344448" type="0" content_hash_code="39770427" os_list="linux,windows" file_path="chrome/browser/ui/webui/sanitized_image_source.cc"/>
+ <item id="sanitized_image_source" hash_code="36944304" type="0" content_hash_code="39770427" os_list="linux,windows" file_path="chrome/browser/ui/webui/sanitized_image_source.cc"/>
  <item id="save_file_manager" hash_code="56275203" type="0" content_hash_code="56692339" os_list="linux,windows" file_path="content/browser/download/save_file_manager.cc"/>
  <item id="sdch_dictionary_fetch" hash_code="47152935" type="0" deprecated="2017-09-16" content_hash_code="16764294" file_path=""/>
  <item id="search_suggest_service" hash_code="57785193" type="0" content_hash_code="132247652" os_list="linux,windows" file_path="chrome/browser/search/search_suggest/search_suggest_loader_impl.cc"/>