Merge "Revert "Revert "Listen for individual subscription mobile data toggles""" am: ab7f5b533d am: 1ff62d0578

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1949076

Change-Id: I3df0695929bfcdd60225aacb1b31871eb8cf3b4b