Revert "Add -D option to restorecon for relabeling /data/data."

This reverts commit ca9afa9fbde3c6bddebf5571d6a235e0535f6cea.
Revert "Unify toolbox restorecon and libselinux restorecon implementations."

This reverts commit 5b2e126cd6e0b9ab193379b20683c9a491a5e31a.