Telephony: google please cleanup your translations....Telephony cleanup

it is really at the moment a nightmare to see compile errors when
getting 100000 of warnings. Whatever we removed already on some
packages the warnings....but still a lot are there

Change-Id: I7452995d5c1f39bcd9eeefe7bbd663d7a8ec94c0
[2/2] Telephony: allow disabling call end sound

Also remove the category around the intrusive
incall settings since more settings are added
below and this looks then strange

PS7
correct defaultValue

Change-Id: I37477582ecb3a8b74eb80db351401d83aab92b82

Conflicts:
	res/values/custom_strings.xml