Merge "Update platform mainline SDK and add test export." am: 6079ce8956 am: 620d93566b am: 1f947f6d25

Original change: https://android-review.googlesource.com/c/platform/system/libartpalette/+/1391376

Change-Id: I6f32b61a766543522143a2de923f98d6acd8afed