common: Annotate some static methods in Collections and Arrays

common: Annotate some static methods in Collections and Arrays

The following methods and static fields can be marked as @NonNull:

Arrays.asList()
Collections.empty{Map|List|Set}()
Collections.EMPTY_{MAP|LIST|SET}

Change-Id: I6a36ac288441099219de19b1ec7793ed5cfd2a01
Signed-off-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Reviewed-on: https://git.eclipse.org/r/59165
Reviewed-by: Alexandre Montplaisir <alexmonthy@voxpopuli.im>
Tested-by: Alexandre Montplaisir <alexmonthy@voxpopuli.im>
Reviewed-by: Hudson CI