display: Add reserved size and status check to MetaData_t

* Move from fixed array reserved region to variable reserved
  region size
* Add bool arrays to indicate whether metadata has been set using
  Gralloc4 indices
* Replace metadata->operation with bool arrays for
  gralloc4/qdMetaData compatibility

CRs-Fixed: 2730848
Change-Id: Id52aac70c23ee4b39db185861f951bb909831afb
7 files changed