Merge "KeyUtil: use static local variable in isFsKeyringSupported()" am: 256b23b1c5 am: 350b5ae900 am: d0b2751e8f

Original change: https://android-review.googlesource.com/c/platform/system/vold/+/1365220

Change-Id: Id61233aba34e8c67a2ab3860c4259eaeaefdab15