Use isMobileDataCapable helper in shortcut/ components

Disabling telephony support may be done either with the
config_show_sim_info config option, or based on whether
TelephonyManager reports data capabilities. The isMobileDataCapable()
helper method ensures both ways are supported.

Bug: 395714454
Test: mm && atest
Flag: EXEMPT bugfix
Change-Id: I4ac756ddbb012ed4b81e3b637b7861877e0ef040