Make the data usage header under settings toggle mobile data directly

Based on below commits:

Credits CyanogenMod
https://github.com/CyanogenMod/android_packages_apps_Settings/commit/3b89d5bd97e57403d869a032abc0eab23aa7cf9d

Credits VanirAOSP and bart452
https://github.com/VanirAOSP/packages_apps_Settings/commit/a5b58dc04c7b52ac31771637d3c6ca652cc0cb06