Rename setDataEnabledWithReason

1. Rename setDataEnabledWithReason to
setDataEnabledForReasn

2. Allow isDataConnectionAllowed to be accessed by
same apps as isDataEnabledForReason

3. Make these apis public

Bug: 156332911
Test: cts and build
Change-Id: I54825a2b6932daf64d5b8da6e32d301f03a04de9
Merged-In: I54825a2b6932daf64d5b8da6e32d301f03a04de9
1 file changed