The existing unity plugin (an example in webrtc codebase) does not support camera access on Android platform. This CL implements such functionality.
TBR=gyzhou@chromium.org
BUG=webrtc:8067
Review-Url: https://codereview.webrtc.org/2993273002
Cr-Commit-Position: refs/heads/master@{#19277}
This CL was modified from work of sharifferdous@ (intern supervised by lliuu@)
BUG=webrtc:7389
Review-Url: https://codereview.webrtc.org/2987723002
Cr-Commit-Position: refs/heads/master@{#19146}
Unity native plugin has to use Pinvoke technology in its APIs
This plugin dll can also be used by Windows C# applications other than
Unity.
BUG=webrtc:7389
Review-Url: https://codereview.webrtc.org/2823783002
Cr-Commit-Position: refs/heads/master@{#18108}
