Settings: fix NPE

if the user resumes InputMethodAndLanguage settings and
the user dictonary preference was already removed before,
the user will run into a NPE.

check it to fix it.

Change-Id: I1eac844720768bb668e26f0a572c7876b7b0bcee
Merge "Settings: fix NPE" into jb4.3
Settings: Clean up

Change-Id: Ib34b062914edc29e7b9a1283bbb7dc89d18fbaad
Merge branch 'jb4.3' of https://github.com/SlimRoms/packages_apps_Settings into HEAD