galaxys2: Fix the inability to mount/unmount sdcard

Change-Id: Ifddbf979e5de937d2b2b3d850ccb66c3d731bc35
SELinux: Remove duplicate rule

This is now declared in the global sepolicy

Change-Id: I2cca94e5592484c05f33868745d3984f8394efa9
galaxys2-common: Update recovery_keys

Cleanup and update, see: http://review.cyanogenmod.org/62724

Change-Id: If92804a89fb403defc904183fae8422047381a31