Support for HW JPEG Decoder in SKIA

Add support to use HW JPEG Decoder in SKIA
through dynamic loading of vendor specific
library. Vendor library to provide APIs to
check if HW decode is possible for a stream
and if so decode the stream. Methods
allocPixelRef and getPrefConfig in
SkImageDecoder made public because vendor
lib has access only to the SkImageDecoder
and not its derived class.

Change-Id: Ie6e9366603a3a3923d7f041d7601589dadf75ac8
Add optimization of Skia S32A_Opaque blitter

Adds optimization of Skia S32A_Opaque_BlitRow32 blitter using ARM NEON
instruction set. Special cases for when alpha is zero or opaque.
Improves performance platform wide.

Change-Id: I0ffeb23b128e61cfe581ad121f227631d2918686
Signed-off-by: Henrik Smiding <henrik.smiding@stericsson.com>
Signed-off-by: Patrik Ryd <patrik.ryd@stericsson.com>
Add optimization of Skia S32A_Blend blitter

Adds optimization of Skia S32A_Blend_BlitRow32 blitter using ARM NEON
instruction set. Special cases for when pixel alpha is zero.
Improves performance platform wide.

Change-Id: I6c8bf8a9525838682206ebd139855354d6b3a563
Signed-off-by: Henrik Smiding <henrik.smiding@stericsson.com>
Signed-off-by: Patrik Ryd <patrik.ryd@stericsson.com>
Merge "Support for HW JPEG Decoder in SKIA" into lp5.0
Merge "Add optimization of Skia S32A_Opaque blitter" into lp5.0
Merge "Add optimization of Skia S32A_Blend blitter" into lp5.0