Merge "Replace security_context_t type" am: 530329222f am: cdbde55e7b am: 0bef24b06b am: 1d40040766 am: a01f4f8a25

Original change: https://android-review.googlesource.com/c/platform/system/vold/+/1824052

Change-Id: I372be1187cc59177785500488684c018e9c49193