Add optimized S32A_D565_Opaque_Dither blitter.
Add optimized S32A_D565_Opaque_Dither blitter.

Adds optimization of Skia S32A_D565_Opaque_Dither blitter using
ARM NEON instruction set.
Improves performance in browser.

Change-Id: Ie20fb3cf3ad9a60f01b79e3ed2ddba7651bcf013
Signed-off-by: Henrik Smiding <6d299cc47d6d35c32bbc7a3351feef497705fdf7@stericsson.com>
Signed-off-by: Patrik Ryd <c90cc58c87de5ea9faa5a3d671c91d45edbf3836@stericsson.com>

AOKP/external_skia,AOKP/external_skia,AOKP/external_skia,AOKP/external_skia