Revert "typo"

This reverts commit c77e00c2fd783dc2c7ae2eca39a070c630a11181.
Revert "fix build"

This reverts commit 8b991156e3af80daa46d74da4af30b91a865c6ed.
Revert "ls notification add PreferenceFragment"

This reverts commit 083dfc31f8252094e25808cee0c0e772607c3f12.
Revert "edt"

This reverts commit ba05e0e0f0f014c908c7d75296960a22a951fbef.