Use SwitchPreference for spell checker setting

This is a follow up of I1f7214c689.

Bug: 15781377
Change-Id: I7289b8b724e086da80ab3849cc567560c1a8502d
2 files changed
tree: e65754ce222bb1352e35b518f01e2087154bd6c0
  1. dictionaries/
  2. java/
  3. native/
  4. tests/
  5. tools/
  6. Android.mk
  7. CleanSpec.mk