network connectivity indicator

[durka]

Show an icon in DefaultActivity for whether mobile data and/or wi-fi are connected

[habeIchVergessen]

take a look at commit added flight mode notification. i guess 50% are done.

[durka]

Partially implemented in the signal-indicators branch. For reference (this is a note to myself):

https://github.com/mvglasow/satstat/blob/master/src/com/vonglasow/michael/satstat/MainActivity.java https://github.com/CyanogenMod/android_frameworks_base/blob/db6e4704ebe0d1c12e7ed2057b2678bd4ccfa595/packages/SystemUI/src/com/android/systemui/statusbar/policy/NetworkController.java#L618