ScopedStorageDeviceTest: FUSE is always used if passthrough is enabled

When FUSE passthrough is enabled, the target file is always opened as
FUSE, not as a lower file system.
Extend CtsScopedStorageDeviceOnlyTest with this new behavior.

Bug: 168023149
Test: CtsScopedStorageDeviceOnlyTest
Signed-off-by: Alessio Balsini <balsini@google.com>
Change-Id: I6f67c32385ce4096f86ba1c4b1d5399e0c51bd0e
Merged-In: I6f67c32385ce4096f86ba1c4b1d5399e0c51bd0e
1 file changed