Use kUtilityFramebuffer in ReadTexture
Use kUtilityFramebuffer in ReadTexture

This avoids creating a temporary framebuffer each time.

PiperOrigin-RevId: 490163892

google/mediapipe,google/mediapipe,google/mediapipe,google/mediapipe,google/mediapipe,google/mediapipe,google/mediapipe,google/mediapipe