Revert of Optimize Android NV12 capture

Revert of Optimize Android NV12 capture (patchset #2 id:20001 of https://codereview.webrtc.org/2317443003/ )

Reason for revert:
Import breakage in g3.

Original issue's description:
> Optimize Android NV12 capture
> 
> This CL optimizes the Android capture NV12 -> I420 + scaling code. For
> example, when the input is 1280x720 and we adapt to 640x360, this CL:
>  - Reduces conversion time from 3.37 ms to 1.46 ms.
>  - Reduces memory footprint by 1 MB.
> 
> BUG=webrtc:6319
> 
> Committed: https://crrev.com/36d38cbb153e19bdc3c62a750aba6889da40aac2
> Cr-Commit-Position: refs/heads/master@{#14167}

TBR=sakal@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:6319

[magjed_webrtc, 2016-09-16 07:37:06]

Created Revert of Optimize Android NV12 capture

[magjed_webrtc, 2016-09-16 07:38:30]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.webrtc.org/2341723005/ by magjed@webrtc.org.

The reason for reverting is: Import breakage has been fixed..