5fad2bea2a
Adds usage of SystemChrome.setAPplicationSwitcherDescription to update the page title for the AutoComplete demo page. [Before screenshot: example AutoComplete](https://screenshot.googleplex.com/8DpESj4QrQA2YrW) [After screenshot: example AutoComplete](https://screenshot.googleplex.com/6AdfSA8a8VwUaXM) Fixes b/338056490 *Replace this paragraph with a description of what this PR is changing or adding, and why. Consider including before/after screenshots.* *List which issues are fixed by this PR. You must list at least one issue. An issue is not required if the PR fixes something trivial like a typo.* *If you had to change anything in the [flutter/tests] repo, include a link to the migration guide as per the [breaking change policy].*