[automerger skipped] vold: only allow emmc_optimized on eMMC storage am: 006eed8e3a am: 65aa48c810 -s ours am: 784638461d -s ours

am skip reason: Change-Id Ie27b80658db53b1a4207b3cbb4e309d05130812e with SHA-1 006eed8e3a is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/vold/+/12098822

Change-Id: I871c728b23ecf0f22b01f3f95336e4a7b07a0f5b