Add method to clear user history dictionary for testing

This change should be checked in together with I19cd689157.

Bug: 12179576
Change-Id: I5cc9f52a37ad6623809a14575f3f4b1cd18725c3
1 file changed
tree: c4f2472b9759c4a3db4f0a326c5ecf6e93119a95
  1. dictionaries/
  2. java/
  3. native/
  4. tests/
  5. tools/
  6. Android.mk
  7. CleanSpec.mk