[cleanup] Resolved type safety warnings Added type parameter for collections where appropriate Change-Id: Ie65f5e2d86243bab04c0c5ecb2e5af609c82a456 Signed-off-by: Alexander Fedorov <alexander.fedorov@arsysop.ru> Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.team/+/183226 Tested-by: Platform Bot <platform-bot@eclipse.org>