Fix incorrect status display on UI in airplane mode

UI should display "No Service" instead of "Searching for Service"
in airplane mode.
Changes done to set ERI text to "Searching for Service" only when
radio is on.

Change-Id: Iee1e6e255090c07b4d931fe7fa4095abe9813df1
CRs-Fixed: 368996
(cherry picked from commit 2c28e2ffec00136c4f614953d2bc8096a226d35c)
(cherry picked from commit 6ac1d8a03f87a467047d35229276a98303f8ed64)
(cherry picked from commit 46c7951b00a029446fc998bad6f938b510e54f0e)