msm: vidc: Update control capabilities at SESSION_INIT stage

Update control capabilities at SESSION_INIT stage instead of
SESSION_INIT_DONE to make sure all control capabilities are updated
before query capability is done.

Change-Id: I682206671e4906c7661270852482a0c59b939765
Signed-off-by: Akshata Sahukar <asahukar@codeaurora.org>