DO NOT MERGE canWrite() for top level directories

Return false for non-default top-level directories

BUG: 159104838
Test: manual via test app
Test: atest ScopedStorageHostTest#testAccess_directory
Merged-In: I411cfc43009c8f14132fba3c94d7b2d24bbcb0e9
Change-Id: I411cfc43009c8f14132fba3c94d7b2d24bbcb0e9
5 files changed