Implemented playback of sound from ICON1.PMF in UMD browser.

git-svn-id: http://jpcsp.googlecode.com/svn/trunk@3672 4ab978e6-3352-0410-996c-0b42db0051c8
Fixed font shadows displayed from sceUtility dialog (savedata, messages). Was broken by r3665.

git-svn-id: http://jpcsp.googlecode.com/svn/trunk@3673 4ab978e6-3352-0410-996c-0b42db0051c8
More robustness in the UMD browser while reading the ICON1.PMF: read the PSMF header to check if an audio stream is present.

git-svn-id: http://jpcsp.googlecode.com/svn/trunk@3674 4ab978e6-3352-0410-996c-0b42db0051c8