As a part of updating android sample apps I found that ./gradlew assembleRelease failed in the gradle configuration step. Similar to this presubmit failure
Declare an explicit dependency on ':flutter:copyFlutterAssetsRelease' from ':flutter:bundleReleaseLocalLintAar'

We ran into a similar issue in https://github.com/flutter/flutter/pull/137370/files and just added the dependency with no ill side effect. I think doing the same is gross but testing locally it seems to work.