FW: move config_show4GForLTE bool from systemui to internal fw base

*SystemUI bools cannot be accessed from RC. This moves the config
 bool specifically for the showing the 4G or LTE icon by default
 to internal FW base so that it can be accessed from RC for the
 following: http://gerrit.aokp.co/#/c/12851/

*Additional note: any device overlays that set this value to false
 will need to be moved from SystemUI to internal fw base.

Change-Id: I8d24fa888abe038375b3808bb54410fe98ec10e4
Signed-off-by: Jonathan Steadman <xxwhitehawk@gmail.com>