Correcting Buffer Allocation for Shared Display

In case of shared display mode, the picture buffer allocated has to be
larger to accomodate the incorrect half pel reference to the last row in
the picture. Adding memory for the same.

Bug: 70350015
Bug: 70349694
Bug: 70349612
Bug: 70349754
Bug: 70349868
Bug: 70526352
Bug: 70350086
Test: manual
Change-Id: I41905d101093ae20ab14193c21669b8c4a24f30c