Fix SPN_STRINGS_UPDATED_ACTION.

Change EXTRA_SHOW_SPN and EXTRA_SHOW_PLMN to be false if spn and plmn
are null or empty respectively. For CDMA EXTRA_SHOW_SPN is always false.

bug: 3191159
Change-Id: Ic13b946cee10b123ec4960f2d22e13c8cb1dd20d
2 files changed