[automerger skipped] Merge "Split MOUNT_FLAG_VISIBLE into...

[automerger skipped] Merge "Split MOUNT_FLAG_VISIBLE into MOUNT_FLAG_VISIBLE_FOR_{READ, WRITE}" am: bddb4491 am: 6e9d3754 am: b43b71a2 am: ef8924f4 -s ours

am skip reason: Merged-In Ia55673400d9f713f221650e1335a46ba11f6f027 with SHA-1 4461c5a1 is already in history

Original change: https://android-review.googlesource.com/c/platform/system/vold/+/1891635

Change-Id: Ifca17aab8b747877957d739d4c1b75f834ad9561