display: Remove qdMetaData and gralloc_priv.h usage

Gralloc- remove qdMetaData and gralloc_priv, and general cleanup

Composer-
Change qdMetaData getMetaData access to the newly added fast get
option GetMetaDataValue via gr_utils. Cleanup all usages
of qdMetaData and gralloc_priv and replace with
mapperextensions equivalents wherever possible. Cleanup all but
enum usages from libqdutils (deprecate completely in future when
there is no user left).

gpu_tonemapper and libqdutils-
remove libqdMetaData and gralloc_priv usage

LNXDISPLAY-1255
LNXDISPLAY-1612
LNXDISPLAY-1469
LNXDISPLAY-1613
LNXDISPLAY-1610

Change-Id: Iec96e309aac97d6e8a61223c7017144e05b8cb1a
34 files changed