HLTE: Add support for S-View style flip cover.

  Adds support for flip cover or lid waking device also.  With
  recent commits this will also automatically unlock the device
  if no screen security is set.

Change-Id: I64ea739a8e9a46015544ceaa3cddca01f277a74d
Merge "HLTE: Add support for S-View style flip cover." into cm-11.0