Merge "vts_libsnapshot_test: Fix free space calculation." into android12-tests-dev am: abed76bf3e

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2066968

Change-Id: I9c39be260aade8514793db2c607e3825503d33b8
Signed-off-by: Automerger Merge Worker <[email protected]>