tree d0a9fd74e6cdd213c45e10a8007eba31ed1e7ddb
parent 4aacd8b6685f5879f1fc9137961edbff46d29471
author Jeff Sharkey <jsharkey@android.com> 1534203774 -0600
committer Jeff Sharkey <jsharkey@android.com> 1534265803 -0600

Methods to translate sandbox paths.

System components (like MediaProvider) will live in a mount namespace
that has a view of the "real" shared storage device, and normal apps
will have "sandboxed" views of the shared storage device.  (Parallel
changes are implementing these namespaces in vold and installd.)

The system components mentioned above will need to translate between
the two namespaces, so this change introduces methods that perform
that translation, along with a nice batch of tests to verify.

Test: atest frameworks/base/services/tests/servicestests/src/com/android/server/StorageManagerServiceTest.java
Bug: 111893193, 111892833, 111268862
Change-Id: Iae91a44ce09eb33d6cd9b90f6c7b4f88c8cd12f0