tree e286eabea7de21dc9dd824cf18b1c48abf55afed
parent 9c57380cc64fdc7cca42fb8facaa462e715ed8d7
author Louis Pullen-Freilich <lpf@google.com> 1569334099 +0100
committer Louis Pullen-Freilich <lpf@google.com> 1573582486 -0500

Adds ColorPalette interface and surrounding infrastructure

This makes some things such as animating color values easy to implement,
and is also early preparation for future light/dark theme support.

The default backing implementation is a to-be-memoized class containing
observable color properties, so that when values in this are changed we
only recompose composables that directly consume these colors.

Unary plus syntax is temporary, and should be going away soon after
compiler changes.

Bug: b/138714596
Test: ColorPaletteTest / ColorPaletteBenchmark
Change-Id: I63d53f99413d3eb156abb35b70bc06fc6797ed58