Merge "Clarify meaning of key parameter to AStorageManager_mountObb()" am: a90b4e7b44 am: 9375660cfe am: a83e726a6b

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2008013

Change-Id: I9a119616708f95c49d7cbaa9221017dc3cec60aa