A straphanger randomly shoved onto Brooklyn subway tracks was left traumatized to the point of being suicidal, his mom said Sunday — while blasting Mayor Eric Adams’ latest plan to try to curb soaring transit crime. Audrey Martin, whose son David Martin, a 32-year-old Upper East Side waiter, suffered a broken collarbone and painful bruises in the Friday afternoon attack on an L-train platform, railed to The Post, “Mayor Adams is completely not in touch with what’s going on.