Android: Avoid problems when writing to SD card on Kitkat.

git-svn-id: svn://svn.code.sf.net/p/subsonic/code/trunk@3978 104adb81-38d2-4886-885e-82898e39ce25
Android: Upgraded to version 55 and API level 19.

git-svn-id: svn://svn.code.sf.net/p/subsonic/code/trunk@3979 104adb81-38d2-4886-885e-82898e39ce25