fix invalid unref/ref sequence with jobject in opengl android video renderer.
add xperia mini to echo calibration table
Check obj in ms_snd_card_set_preferred_sample_rate
redraw background when incoming video resolution is changed.
Revert "Check obj in ms_snd_card_set_preferred_sample_rate"

This reverts commit cc85d20609957d7aadbabf9230972bca3d5daa2a.
changes in nowebcam:
- remove the hardcoded jpeg
- allow to set a NULL image so that nothing is sent.
autodetect cpu count.
Fix compilation error.
sound improvements for Android
* workaround hardware bug on Galaxy S3 mini, where audio recorded is bad at 44100 and 32000 Hz.
* allow native sound system to work on Android 4.3 (few API changes)
* move android_echo.* files to a more generic implementation, so that it can be used on other OS as well.
fix compilation problem outside android
activate hardware echo canceller when it is available.
Fix compilation on Linux.
add msopus to android build script
update Android.mk
update device list
-improve media_stream api
-factorize audio_iterate, video_iterate, media_iterate
-add up/down bw stat to MediaStream
-fix bitrate controller driver for opus
-add Mediastream tester
Merge commit '29c45b4'
android open-gl display fixes
fix opengl bug
set default value for prefered_sample_rate on iOS card