Merge "vold: switch f2fs gc_urgent_high to gc_urgent_mid" am: 119b9ae8a5 am: a1f5053ea0

Original change: https://android-review.googlesource.com/c/platform/system/vold/+/2027903

Change-Id: I2e6b56b633570fa5ecb1b402e8d7f7b12b7e9f60