Update Lottie animations for gesture navigation tutorial to enable custom colors

This change introduces tokens for all the lottie animations in the
gesture navigation tutorial so that the colors can be changed to match
with the current design spec at http://shortn/_aig7n8W7rF

Flag: ENABLE_NEW_GESTURE_NAV_TUTORIAL
Bug: 279823249
Bug: 281764891
Test: Tried changing colors and verified that lottie animations changed
appropriately.

Change-Id: If2c820826603fb1cf424f5f0c97d83b195d26606