Merge "Create an empty hooks data structure in palette." am: 9a21d5e4a0 am: 0ef10463d5 am: 49c3d6196d

Original change: https://android-review.googlesource.com/c/platform/system/libartpalette/+/1385822

Change-Id: I79edbbf0c2d08e798a4a47656fadc433708e62cd