Merge "vold: only allow emmc_optimized on eMMC storage" am: 428ae6e90a am: 7a1c4ccb96 am: 09f789e227 am: 4903027a20

Original change: https://android-review.googlesource.com/c/platform/system/vold/+/1356175

Change-Id: I6f8316c1eadfa2256bf515a96a45860a021ab088