Navarone Garcia “always tried” to keep his addiction struggles from his mother. The 37-year-old musician is the son of Priscilla Presley and Marco Garibaldi and recounted how he had fallen into drugs and was using multiple times a day but admitted that his famous mother was there for him every step of the way. He told ‘Entertainment Tonight’: “It started with weed in high school and, by the time I was 16, 17, I had kinda tried everything. don’t know if you can say [I became a] casual user of heroin, but I didn’t have a problem with it until 2015. All of a sudden I just noticed a difference. It…