This reverts commit baf1f0bd

Change-Id: I7d959b9b626c8fb69a57788e243752952258fa80

DO NOT MERGE

Upload using an intent service rather than just a thread.  More robust in case the keyboard
is closed and the upload hasn't finished yet.

multi-project commit with I40db74fb780e01364609339764e150f0291d3f9b

Bug: 6188932
Change-Id: Ie980d38a713d15c01083d41bd73f0602ec75dd16

DO NOT MERGE

- Captures complete motion data for all words in an n-gram.
- Also filters n-grams properly; if any word in the n-gram is not
  in the dictionary, it is not included.
- Simplify ResearchLog to not require explicit state
- Added LogBuffer class MainLogBuffer class to allow n-gram-level decisions
  about privacy.
- Moved LogUnit out from ResearchLogger

multi-project change with Ie2bc79fd7fe6b951b24771e94b8d4ca21989af65

Bug: 6188932
Change-Id: I568c90d4af07e7c759c1e7fc64b716bd8c7b4ae5

- uploads files in the background to server

multi-project commit with Ie0d937773e04b2fbefc8d76c231aaa52ebc392c9

Bug: 6188932

Change-Id: I90bb0e237eeb567e4cbb51085f2229f17f1fe71c