libgralloc: Import header for Venus buffer size calculation

Import the common header file with Venus alignment requirements
to calculate venus buffer size.

Change-Id: I86cba91de8f7a3845a4592243b4f21e7cda03315
libgralloc: Calculate aligned width & height using common header

For Venus, calculate aligned width & height using common header.

Change-Id: I622fee19693cfc550796d5949185c146c6a7f173
libgralloc: Add Perform function to get the stride.

- Introduce a new class to Get the Adreno computed stride information.
This class has been added to allow adreno library computed strides to
be propagated to the allocation function as well as those clients
requesting it.
- Add a new Perform function to get the stride. The width and the format
can be passed from the calling functions (like EGL) to get the stride of
the buffer.

Change-Id: I4c2b4a02deff327f0ea5558c478997527fe9d3cf
libgralloc: Get the stride information from libadreno_utils.so

libadreno_utils.so is an adreno utility library. It computes the
optimal stride required for a surface of a particular width and
bpp. Using this computed stride allows us to efficiently use the
dual memory channels and increase performance.
Currently the utility library only computes the optimal stride
for RGB surfaces.

Change-Id: I0f70bd11602a5144515ab07c3bd2b80a01586a06
FIX: "display: Reset metadata pointer to NULL during unmap."

This reverts commit 4502e424d7b9d25da95ff3078f9842385234240a.

Change-Id: I8c357b466f6b9192e76c01d4dc4df4a682d45572
qdutils: Default to GPU composition

If composition type is not set, default to GPU composition.
This is because CPU composition is not supported from MR1 onwards

Change-Id: I951dcb5586a8dbcfbe73cd7292d0f1690d6528ba