am 535ad65e: am 0f805632: cherrypick Change-Id: Ic268b65b127b356155dd62d737029ce442c12f51 docs: add OEM USB Drivers document and update install guide with windows 7 procedures misc style edits

* commit '535ad65e543d724d177fb8e8175e120d571d804b':
  cherrypick Change-Id: Ic268b65b127b356155dd62d737029ce442c12f51 docs: add OEM USB Drivers document and update install guide with windows 7 procedures misc style edits