Merge "Move BLOCKED_REASON_* constants from NPMS into ConnectivityManager." am: 8c03c2a82e am: 13b4d67d40

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1651532

Change-Id: I99fe564e3fd7e6e92416a3d76054e62969cdd48f