Rename isDataConnectionEnabled to isDataConnectionAllowed Test: Treehugger; no function change Bug: 148218347 Change-Id: Ie7fde6ab896f9fc665167c3050275b03c9e63198 Merged-In: Ie7fde6ab896f9fc665167c3050275b03c9e63198 (cherry picked from commit c91980a81bde1a80fe1482dd87e9919bd7ad4891)