Naomi Luis 371fe1a442 liboverlay: Update overlay and rotator during resolution change
Whenever there is a resolution change, update the overlay, rotator
paramters. Map the rotator memory according to the new size required,
and unmap the previously mapped memory.
Change the size calculation for NV21 formats, since the gralloc
allocates memory which is rounded up to the next 4K.

Change-Id: Idb4037422cbd80083e6ba14f229511a17cb61873
CRs-fixed: 287347
2011-09-19 19:16:36 -05:00
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