[DO NOT MERGE] Add a sequence number to SuggestedWords.

This allows testing for suggestion freshness in an asynchronous
suggestions world.
Cherry-pick of Ic76cd175

Bug: 11301597
Change-Id: I45a84de0632062475eebe30234b3147f1c680359
3 files changed
tree: 2335618534195200a39f29a21c5a15bcca81599d
  1. Android.mk
  2. CleanSpec.mk
  3. dictionaries/
  4. java/
  5. native/
  6. tests/
  7. tools/