Merge "Add API to get remaining lifetime as a percentage." into main am: f75d8fc237 am: 3774a02e66

Original change: https://android-review.googlesource.com/c/platform/system/vold/+/2940229

Change-Id: Ib004cb63ef91f30a7df230f99c732dce9eccd6c6
Signed-off-by: Automerger Merge Worker <[email protected]>