Reuse old preferences if possible.

This is an optimization. It also happens to work around what
seems to be a framework bug in JB MR1 / MR1.1.

Bug: 8771179
Change-Id: I62cc7acdc8656d75f8a50c068c4e9d8c6ceb74a0
2 files changed
tree: 09ab7753ca1b3e85276f47b27190c84037850756
  1. dictionaries/
  2. java/
  3. native/
  4. tests/
  5. tools/
  6. Android.mk
  7. CleanSpec.mk