Revert "build: set data roaming always to false"

This reverts commit bb6d36adf4c08924a1ac0c2818d5525fe881c9ac.

Change-Id: I42e034fc1434eadc640b360a6bbcce1ac43e9c4c
Merge branch 'kk4.4' of https://github.com/SlimRoms/android_build into kk4.4