Now that StorageManager asks vold to create package directories again,
apps only need write access in their own app-private directory. Both
app-private and OBB dirs will be created by privileged daemons as
needed.
This means we can use the "default" sdcardfs view for the Android/
bind-mount again. This has the added benefit that it fixes shell, which
wasn't in the "everybody" group, and therefore suddenly couldn't enter
/sdcard/Android anymore.
Bug: 146189163
Test: atest AdoptableHostTest
Change-Id: I37ca3b19ea4d11ed866efa808f51be945a4dc080
adecd0ae75