Stop AndroidVideoCapturer asynchronously.
The purpose is to avoid a deadlock between the C++ thread calling Stop and the Java thread that provides video frames.

BUG=4318
R=glaznev@webrtc.org, magjed@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/35249004

Cr-Commit-Position: refs/heads/master@{#8425}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8425 4adac7df-926f-26a2-2b94-8c16560cd09d
8 files changed