Re #1762: Add I420/IYUV output format to capture devices.



git-svn-id: http://svn.pjsip.org/repos/pjproject@4836 74dad513-b988-da41-8d7b-12977e46ad98
Re #1762: Fix native preview not shown issue by starting capture session from main thread.



git-svn-id: http://svn.pjsip.org/repos/pjproject@4837 74dad513-b988-da41-8d7b-12977e46ad98
Re #1762: Support more capture sizes (was only 352x288) and automatically find the closest supported size from the requested size.



git-svn-id: http://svn.pjsip.org/repos/pjproject@4838 74dad513-b988-da41-8d7b-12977e46ad98
Fixed #1766: Assertion due to stray retransmit timer in UAC transaction completed state

git-svn-id: http://svn.pjsip.org/repos/pjproject@4839 74dad513-b988-da41-8d7b-12977e46ad98