klte-common: enable multiple users

Change-Id: I9223ceeac3f0bde79e175446b08f09b8754ae337
(cherry picked from commit e642da7e3e800585957d88e1cc22b59e108a6e32)
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
(cherry picked from commit 02f348206e7e9aa56cbaa02d4a29febc4b4eeebc)