Bug 927724 - [DSDS][Gaia] Voicemail webapi will be changed for DSDS

- add feature detect for Voicemail webAPI
Merge pull request #13000 from EragonJ/bug-927724

Bug 927724 - [DSDS][Gaia] Voicemail webapi will be changed for DSDS
Bug 915584 - [Bluetooth][Contacts] Receiving a contact via bluetooth when the device does not have SD Card flow differs from the expected