Initial device bringup [2/3]

Signed-off-by: Jacob Whatley <jacob.whatley91@gmail.com>
Change-Id: Ic90a34e4f9962e9d88f89393e007431600098c2e
jf: Fix race conditions during bootup

 * Use fs-mgr to mount everything.

Change-Id: I2b96dfe1c0b61a5eb8656eab53123cbc17528866