Music: Improve the feature of setting ringtons for Dual SIM

Show both two setting rington options with SIM card names customized by user
when two SIM cards are available. If there is no SIM card is available,
both two options will be hidden.

Change-Id: Ie5e4369348bae3c4dfcbc4982cea9a7b0c2dccef
CRs-Fixed: 984257
3 files changed