Allow clients to draw carousel cards clockwise

This consists of the following:
- Plumb the new fillDirection parameter
- Set the slotPosition (and consequently the cardPosition)
  at the appropriate points
- Compute motion and overscroll based not on first and last
  bias but on lowest and highest bias.
- Let cullCards() allow thetaFirst > thetaLast

Bug: 3177563
Change-Id: I2bb7b3f906726db5ced2ea5bad0e5395f5821d1d
4 files changed
tree: 332a2e4aac60e3e23fb71948ddf92e657d96e403
  1. carousel/
  2. common/
  3. CleanSpec.mk