Telephony: fix Flip to mute/silent

maybe fix http://jira.omnirom.org/browse/OMNI-412

Change-Id: Ie12ff6aab6ffdaf8638e0ac39f3911f7ecb8793c
Service/Telephony: FR translation

PS2: correction
PS3: move string-array in custom_arrays.xml

Change-Id: I9364ca77a9f1a66e18d15abb03442b4b5d55833b
merge changes from Omni 4.4 into local branch