klte-common: enable multiple users

Change-Id: I9223ceeac3f0bde79e175446b08f09b8754ae337
klte-common: set long-press on HOME key to search assistant

* We already have a "recents" key so it would be redundant to default to
that again for long-press on HOME

Change-Id: Ie05c1ce2bfdab21ec9982c9ea959eb2295c2907c