Merged https://github.com/google/mediapipe/pull/1969, https://github.com/google/mediapipe/pull/2039, https://github.com/google/mediapipe/pull/2101, https://github.com/google/mediapipe/pull/2136, https://github.com/google/mediapipe/pull/2154, https://github.com/google/mediapipe/pull/2201, https://github.com/google/mediapipe/pull/2291, https://github.com/google/mediapipe/pull/2292, https://github.com/google/mediapipe/pull/2347, https://github.com/google/mediapipe/pull/2350, https://github.com/google/mediapipe/pull/2450, https://github.com/google/mediapipe/pull/2462, and https://github.com/google/mediapipe/pull/2464.

A huge thank you to all contributors: @Abduttayyeb @brettkoonce @chr0nikler  @daniel13520cs @gabrielsanchez @GantMan @GzuPark  @homuler @magamig @PeterPocsi @TomHsiao1260  @yuripourre