Add setting to indicate whether the eUICC is provisioned.

This bit will only be set to true after a profile has been downloaded
to the eUICC. It will be used to suppress UI and messages about the
eUICC for users who have never used it.

Bug: 38460669
Test: TreeHugger
Change-Id: I056f131381ba4cb6f3fc32bc9915269337dd839d
1 file changed