jf: Enable use of two stop bits for BT

 * Improves reliability

Change-Id: Id265ad4758b6eacdf56ec0843c282aaa7ed9c8a7
jf: Underp BT tethering

Change-Id: I374b478cdc6b10220ee71ee7fd330e6f18e71b82
Merge remote-tracking branch 'cm/cm-10.2' into dc43