Merge "Add "create-partition" debugging API to gsi_tool" am: 802d4c6a7b am: 0b094013ed am: 74198d437c

Original change: https://android-review.googlesource.com/c/platform/system/gsid/+/1469543

Change-Id: I97b3c31ee76eaf03e3cc70e7e47d8d1425054f8d