[quick_actions_android] Remove deprecated usesCleartextTraffic

[mboetger]

Removes deprecated usesCleartextTraffic.

Addresses: #182553

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[flutter-dashboard]

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[gemini-code-assist]

Code Review

This pull request removes the deprecated android:usesCleartextTraffic attribute from the debug AndroidManifest.xml in the example app. It is replaced by a network_security_config.xml file, which is referenced in the manifest to permit cleartext traffic for debug builds.

[stuartmorgan-g]

test-exempt: configuration change

[stuartmorgan-g]

LGTM

[auto-submit]

autosubmit label was removed for flutter/packages/11063, because - The status or check suite Linux_android android_device_tests_shard_1 master has failed. Please fix the issues identified (or deflake) before re-applying this label.