IMS : Check RTT mode in AOSP implementation

- Current AOSP implementation is not checking RTT mode UI
  setting before setting the rtt mode in dial request.
- Due to additional check in QCOM implementation RTT Mode
  is being set by AOSP and not getting overwritten.

Change-Id: Ic494d8d66fb38b3705cbeed6ff85c3c88fb02a5a
CRs-Fixed: 3097375
1 file changed