jewel: show LTE icon instead of 4G

Change-Id: I44de5a9d8da44997f772f42ca5c405652055756b
jewel: move mobile tether config to s4-common

Change-Id: I937657804a8190eb4a9d99a736e161623d4d3f29
Merge remote-tracking branch 'upstream/cm-10.2' into cm-10.2