kitakami-common: QCamera2: Fix memory leak when fail to open camera device.

Issue:
When camera open fails, param heap buffer which was allocated
in a deferred thread will not be cleaned up properly because
of improper flag check in parameters deinit().
Fix:
Since param heap buffer is allocated asynchronously, move the
initialization flag check after deallocating param heap.
CRs-Fixed: 1070448
Change-Id: I026f307c5b7501d3607c64c6b36d41eddaf0349a