Added the following columns to the Channels table:
searchable - Used to hide certain channels from search.
locked - Used to prevent unauthorized users from watching certain
channels by requiring passcode.
Added the following columns to the Programs table:
genre - Used to describe the categorical genre.
audio_language - Used to list up available audio languages.
Bug: 14833588, Bug: 14123945, Bug: 14069779
Change-Id: Id01483f56ecf3b665e3d4dbcea1a4800ff7f031d
(cherry picked from commit 3532899452d62b6f2cd9250cb48ec204862fb3b2)
7752244e47