don't fire notifications on initialization (uplift to 1.11.x)

[brave-builds]

Uplift of #6126
fix brave/brave-browser#9481

Approved, please ensure that before merging:

• You have checked CI and the builds, lint, and tests all pass or are not related to your PR.
• You have tested your change on Nightly.
• The PR milestones match the branch they are landing to.

After you merge:

• The associated issue milestone is set to the smallest version that the changes is landed on.

[bsclifton]

CI failing because #6161 and brave/brave-browser#10843 need to be merged first. Then we can rebase/restart this build

[kjozwiak]

Restarting now that brave/brave-browser#10843 has been merged into 1.11.x.

[kjozwiak]

Looks like init failed on all the plaforms once again due to the following:

14:39:19  Error: Command 'vpython src/brave/script/build-simple-js-bundle.py --repo_dir_path src/brave/components/brave_sync/extension/brave-sync-android' returned non-zero exit status 1 in /home/ubuntu/workspace/pr-brave-browser-pr6126_issues-9481_1.11.x/src/brave

[kjozwiak]

Looks like npm run audit_deps failed due to lodash on every platform which is a known issue that's already been fixed on 1.13.x and 1.12.x.

Restarting Win x64 as build failed due to Agent was removed as per https://ci.brave.com/job/pr-brave-browser-pr6126_issues-9481_1.11.x/6/execution/node/593/log/

17:23:20  Cannot contact i-059db4936299211f9: hudson.remoting.ChannelClosedException: Channel "hudson.remoting.Channel@fa5dfd9:i-059db4936299211f9": Remote call on i-059db4936299211f9 failed. The channel is closing down or has closed down
17:28:22  Could not connect to i-059db4936299211f9 to send interrupt signal to process

[kjozwiak]

Remaining failure on Win x64 is due to npm run audit_deps which is a known issue on 1.11.x.

[kjozwiak]

Uplift into 1.11.x approved after deliberating with @brave/uplift-approvers. QA has also verified the PR on Nightly as per #6126 (comment).