IMS: Use AOSP RTT_CALLING_MODE key for RTT settings.

Replace proprietary RTT settings db key with AOSP one.
Settings.Secure.RTT_CALLING_MODE is used to save RTT
enable/disable settings instead of the proprietary defined
key.

Change-Id: I4b814bb695b7a28b2802d94f08d574ba96058894
CRs-Fixed: 2393310
2 files changed
tree: 7d4b2b8958e21d018af616cd6b42c937b2766d2f
  1. ims/
  2. internal/