TeleService: Make string translatable

Change-Id: I136826cc42fe6a2e6926124cb12ca3218c1ced4a
Telephony: Disable MSISDNEditPreference until init complete.

  - Avoids NPE. BACON-1832

Change-Id: I4a8919ecb3116375696f76e99c94b33ce961df41
Telephony: Fix NPE while opening allowed number.

Trying to edit existing allowed number caused NPE:

mNameField and mNumberField setText caused TextWatcher afterTextChanged
event while mButton is still null. So set mButton before setTexts.

Change-Id: If444e2d69c77bc10094a1dfd3fc6b700509c6128