Updated network speed indicator, (2/2):

Included:
- Traffic summery

Based on CyanKang:

https://github.com/CyanKang/android_packages_apps_Settings/commit/1639afec98cb489166a67e58d2829ee61e011fe2
https://github.com/CyanKang/android_packages_apps_Settings/commit/c9d2007e24d67b7194f2d9d05b14848cb73c9339

Change-Id: I19481723f81345653131fdb7a17a09cfd59daa85