Merge "Remove subtitle of system default" into tm-dev am: e9e6a008

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/17742044



Change-Id: Ia55f8267c33a6b4b2d3d2de6366c53b2e3a5832b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>