FIX: [stereoscopic] fix 3D support for libstagefright and ios
Merge pull request #3887 from koying/fix3droidios

FIX: [stereoscopic] fix 3D support for libstagefright and ios
changed: don't start the screen saver when minimized. Prevents the start of the ss when maximizing and an endless loop with some ss.
Merge pull request #3893 from wsoltys/screensaverfix

changed: don't start the screen saver when minimized.
[ios] - enable retina support for iPadAir and iPadMini2G