fix(android): getDirectory("") returns current path instead of / path (CB-13849)

[Beutlin]

Platforms affected

• Android

What does this PR do?

Currently the comman getDirectory('') with an empty parameter returns always the root path. It does not matter on which path this command is executed. This is an unexpected behaviour and might cause security issues.
With this patch the path of the current directory is returned, like in other implementations (i.e. browser).

What testing has been done on this change?

It has been tested on an emulator. Furthermore the sourcecode has been evaluated and there is no negative issues with it.

Checklist

• Reported an issue in the JIRA database
• Commit message follows the format: "CB-3232: (android) Fix bug with resolving file paths", where CB-xxxx is the JIRA ID & "android" is the platform affected.
• Added automated test coverage as appropriate for this change.

[janpio]

Hey, I just fixed the problem that caused Android tests to fail in master. Could you rebase this PR please? This should get rid of the Android failures and possibly fix all test failures for this PR.

[Beutlin]

I've rebased my PR.
Nevertheless there are some issues with node.js and Safari.
I'm very certain that I have changed only Android relevant files. If I still get an error the problem must be with your build toolchain.

[janpio]

Yes, see #257

[janpio]

Rerun tests.

[janpio]

CI: Once more please.