[file_selector] Update Android example to use Kotlin DSL syntax#10151

AbdeMohlbi wants to merge 3 commits intoflutter:mainflutter/packages:mainfrom

AbdeMohlbi:AbdeMohlbi_file_selector_build_fils_refactorAbdeMohlbi/packages:AbdeMohlbi_file_selector_build_fils_refactorCopy head branch name to clipboard