Use libjpeg-turbo for YUV->RGB conversion in jpeg encoder
Use libjpeg-turbo for YUV->RGB conversion in jpeg encoder

Cherry picked from:
https://codereview.chromium.org/1886183002/

"""

This removes the previous codepath, which performed a less
accurate conversion to YUV.

It's actually faster to use the more accurate conversion, now
that we have updated to libjpeg-turbo.

z620 Performance Speed-Up:
mandrill.jpg (512x512): 1.13x
color_wheel.jpg (128x128): 1.12x

This should fix:
https://buganizer.corp.google.com/u/0/issues/28161384
https://buganizer.corp.google.com/u/0/issues/21891795

"""

BUG:28161384
BUG:21891795
Change-Id: I8ae61f973fad4e5801dc41220067f73a4ca324a5

aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,Hikari-no-Tenshi/android_external_skia,aosp-mirror/platform_external_skia,Hikari-no-Tenshi/android_external_skia,Hikari-no-Tenshi/android_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,Hikari-no-Tenshi/android_external_skia,aosp-mirror/platform_external_skia,Hikari-no-Tenshi/android_external_skia,aosp-mirror/platform_external_skia,Hikari-no-Tenshi/android_external_skia,aosp-mirror/platform_external_skia,Hikari-no-Tenshi/android_external_skia,Hikari-no-Tenshi/android_external_skia,aosp-mirror/platform_external_skia