/usr/ is in libkf5wallet-dev 5.18.0a-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/KF5Wallet/
/usr/lib/x86_64-linux-gnu/cmake/KF5Wallet/KF5WalletConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5Wallet/KF5WalletTargets.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5Wallet/KF5WalletTargets-debian.cmake
/usr/lib/x86_64-linux-gnu/cmake/KF5Wallet/KF5WalletConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/qt5/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules/
/usr/lib/x86_64-linux-gnu/qt5/mkspecs/modules/qt_KWallet.pri
/usr/include/
/usr/include/KF5/
/usr/include/KF5/kwallet_version.h
/usr/include/KF5/KWallet/
/usr/include/KF5/KWallet/kwallet.h
/usr/include/KF5/KWallet/KWallet
/usr/include/KF5/KWallet/kwallet_export.h
/usr/share/
/usr/share/dbus-1/
/usr/share/dbus-1/interfaces/
/usr/share/dbus-1/interfaces/kf5_org.kde.KWallet.xml
/usr/share/doc/
/usr/share/doc/libkf5wallet-dev/
/usr/share/doc/libkf5wallet-dev/copyright
/usr/lib/x86_64-linux-gnu/libKF5Wallet.so
/usr/lib/x86_64-linux-gnu/libkwalletbackend5.so
/usr/share/doc/libkf5wallet-dev/changelog.Debian.gz