[Tizen] Remove Ringtone from virtual root

IVI doesn't need "Ringtone" path. So, remove it.
[Android] Enable instrument test for Contacts API.

Enable instrument test for Contacts API. And, fixed some issues in
contacts test case. The callback function of Promise is invoked after
oncontactchanges(). So, testNewContactFlag will be false. The test
always fail.
Merge pull request #2238 from shawngao5/enable_testing

[Android] Enable instrument test for Contacts API.
Merge pull request #2204 from shawngao5/ringtone

[Tizen] Remove Ringtone from virtual root