Use sysfs control for storage device GC am: d96b2ac0 am: 1403a820

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/vold/+/18972074



Change-Id: I2f7c0e3e2001d467b12ed2b11a0209a1ff3cc788
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>