Always show band 0

None of the phones I tested ever displayed Automatic band selection as a
choice, probably because no baseband is going to report it supports
mythical band 0. Make sure it is always displayed.

Change-Id: I5082b04ee63a2916941fd1db40762fa990d59583
Merge "Always show band 0" into cm-10.2
Merge branch 'cm-10.2' of github.com:CyanogenMod/android_packages_apps_Settings into cm-10.2

Merged changes from upstream