Use file separator for paths and ROOT_DIRECTORY for root directory path

Signed-off-by: jruesga <jorge@ruesga.com>
New getAbsolutePath method

Signed-off-by: jruesga <jorge@ruesga.com>
Remove context from AIDHelper and add new helpful methods

Context is no more required because AIDs are loaded from
FileManagerApplication and install/uninstall broadcast

Signed-off-by: jruesga <jorge@ruesga.com>
Race condition, better async and finish detection

Signed-off-by: jruesga <jorge@ruesga.com>
FadeEffect and symlink handling

Signed-off-by: jruesga <jorge@ruesga.com>