msm-camera: Enable initial skip for dual camera synchronization

For portrait mode with dual camera synchronization, enable initial skip
to make sure two sensors both start streaming with synchronization
signal.  This fixed the portrait mode switching stability issue.

Bug: 136756925
Change-Id: I2e6e8c463bffd04da441f3da3033e6596f30e72a
Signed-off-by: Chris Ye <lzye@google.com>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>