Analyst Ming-Chi Kuo is out with a note today that predicts next year’s high-end iPhone 15 (Pro) will switch to solid-state power and volume buttons, and that flagship Android phones are expected to follow. Kuo, who tracks smartphone manufacturer components, says the “volume button and power button of two high-end iPhone 15/2H23 new iPhone models may adopt a solid-state button design.” For Apple, the precedent is the iPhone 7, 8, and second and third-generation iPhone SE removing the physical home button. Presumably meant for the iPhone 15 Pro, “Taptic Engines located on the internal left and right sides to provide…