mako: msm: camera: Add live snapshot entry to bus vector table.

msm: camera: Add live snapshot entry to bus vector table.
commit	1d1d3075

The current camera bus vector table does not have an entry
for Live snapshot usecase. Add this entry into the bus vector
table. When user takes a live snapshot during video recording,
just switch to this new entry and when its done, switch back
to video entry. Also, correct the .ab value for video usecase
since the current value is not sufficient for all the usecases.

Change-Id: I0894e3e6554a9d3910d300c8ac17156d21b00a51