Modify sample buffer size for larger displays

BZ: 146848

Increases the intermediate buffer size for sample pixel indexes,
used in the sample proc function calls. If the operation is bigger
than the buffer it's split into multiple calls, creating overhead.
This would especially impact the performance of SIMD optimizations.

Change-Id: I44d0723cb26372050741e28fc14f676ddcd56d77
Category: aosp improvement
Domain: AOSP-Others
Origin: internal
Upstream-Candidate: yes
Signed-off-by: Henrik Smiding <henrik.smiding@intel.com>
Reviewed-on: https://android.intel.com/163478
Tested-by: sys_abtbuild <sys_abtbuild@intel.com>
Reviewed-by: Landberg, Joakim <joakim.landberg@intel.com>
Reviewed-by: Chen, HuaqiangX <huaqiangx.chen@intel.com>
Reviewed-by: Fagerstedt, Axel <axel.fagerstedt@intel.com>