Refactor notifications

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Make ok/cancel strings consistent

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Use module title as notification title in Android 4

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Disable MediaSession until we fix notification problems

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Change play button in file list to play recursively

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>