Merge "Update platform mainline SDK and add test export." am: 6079ce8956 am: 620d93566b am: 1f947f6d25 am: 9a023e9ccd

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

Change-Id: Ic515233399dcb22b2a19ce1c6820c2245c316033