Yuichiro Hanada 9514ed5c2a Add the new format of bigram entries.
In new format, each bigram entry has flags (1 byte), a terminal id (3 byte),
a time-stamp (4 byte), a counter (1 byte) and a level (1 byte).

Bug: 10920255
Bug: 10920165
Change-Id: I0f7fc125a6178e6d25a07e8462afc41a7f57e3e1
2013-10-11 14:50:41 +09:00
..
2012-01-13 15:25:28 +09:00
2013-07-23 19:29:33 +09:00