Mount storage Android/data and Android/obb as tmpfs in app namespace

So Android/data and Android/obb won't be accessing fuse anymore,
and apps should not see other packages as well as it's sandboxed
the tmpfs.

Bug: 155462341
Test: atest AppDataIsolationTests pass after feature flag is on
Change-Id: I5658440772e669c1235d318f708a3d336523754f
1 file changed