Settings: remove duplicate strings

- LOCAL_AAPT_INCLUDE_ALL_RESOURCES := true isn't defined anymore and makes
  duplicate strings visible

packages/apps/Settings/res/values-de/cm_strings.xml:980: error: Resource entry wifi_disabled_association_rejected is already defined.
packages/apps/Settings/res/values-de/cm_aosp.xml:19: Originally defined here.
packages/apps/Settings/res/values/strings.xml:1255: error: Resource entry wifi_display_certification_heading is already defined.
packages/apps/Settings/res/values/cm_extra.xml:29: Originally defined here.
packages/apps/Settings/res/values/strings.xml:1257: error: Resource entry wifi_display_session_info is already defined.
packages/apps/Settings/res/values/cm_extra.xml:40: Originally defined here.
packages/apps/Settings/res/values/strings.xml:1259: error: Resource entry wifi_display_listen_mode is already defined.
packages/apps/Settings/res/values/cm_extra.xml:33: Originally defined here.
packages/apps/Settings/res/values/strings.xml:1261: error: Resource entry wifi_display_autonomous_go is already defined.
packages/apps/Settings/res/values/cm_extra.xml:27: Originally defined here.
packages/apps/Settings/res/values/strings.xml:1263: error: Resource entry wifi_display_pause is already defined.
packages/apps/Settings/res/values/cm_extra.xml:36: Originally defined here.
packages/apps/Settings/res/values/strings.xml:1265: error: Resource entry wifi_display_resume is already defined.
packages/apps/Settings/res/values/cm_extra.xml:37: Originally defined here.
packages/apps/Settings/res/values/strings.xml:1267: error: Resource entry wifi_display_wps_config is already defined.
packages/apps/Settings/res/values/cm_extra.xml:47: Originally defined here.
packages/apps/Settings/res/values/strings.xml:1269: error: Resource entry wifi_display_listen_channel is already defined.
packages/apps/Settings/res/values/cm_extra.xml:32: Originally defined here.
packages/apps/Settings/res/values/strings.xml:1271: error: Resource entry wifi_display_operating_channel is already defined.
packages/apps/Settings/res/values/cm_extra.xml:34: Originally defined here.
packages/apps/Settings/res/values-fr/strings.xml:1330: error: Resource entry adb_over_network is already defined.
packages/apps/Settings/res/values-fr/cm_strings.xml:511: Originally defined here.
packages/apps/Settings/res/values-fr/strings.xml:1331: error: Resource entry adb_over_network_summary is already defined.
packages/apps/Settings/res/values-fr/cm_strings.xml:512: Originally defined here.
packages/apps/Settings/res/values-fr/strings.xml:1332: error: Resource entry adb_over_network_warning is already defined.
packages/apps/Settings/res/values-fr/cm_strings.xml:513: Originally defined here.

Change-Id: I6ff0c52429eb0344c35ac14f27cfff7c4c031b71