Merge "Make minimum gc sleep time tunnable" am: a5d927ba6a am: fc5cdcf04a

Original change: https://android-review.googlesource.com/c/platform/system/vold/+/2132536

Change-Id: I8f5c730caaf8b7f8350a522c001a0a21e99ba8ce
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>