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Some new strings were added to the **widgets** layer(like "Search
results found", "no results found" and etc.) but never got translated
for a long time. Since the issue in g3 has been fixed and the
translation in g3 has finished, this PR is to back-integrate the
translation to framework.

This PR doesn't run the date_localization script. Will update it in a
separate PR.

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [x] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

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