Upgrade xz-embedded to 1b6defd544914bfb4065e343296e5db64ef400e6 am: e6dca0f520 am: 360051f068

Original change: https://android-review.googlesource.com/c/platform/external/xz-embedded/+/2976973

Change-Id: I531fa8d8d66f053727d1373a28c8187a6488392e
Signed-off-by: Automerger Merge Worker <[email protected]>