Merge "Updating strings for Install unknown apps" into oc-dev

    <!-- Summary of app not allowed to write system settings [CHAR LIMIT=45] -->

    <string name="write_settings_off">No</string>

    <!-- Summary of app trusted to install apps [CHAR LIMIT=45] -->

    <string name="external_source_trusted">Yes</string>

    <string name="external_source_trusted">Allowed</string>

    <!-- Summary of app not trusted to install apps [CHAR LIMIT=45] -->

    <string name="external_source_untrusted">No</string>

    <string name="external_source_untrusted">Not allowed</string>

    <!-- Title of switch preference that controls whether an external app source is trusted or not [CHAR LIMIT=50] -->

    <string name="external_source_switch_title">Allow app installs</string>

    <string name="external_source_switch_title">Allow from this source</string>

    <!-- Title of setting that controls gesture to open camera [CHAR LIMIT=40] -->

    <string name="camera_gesture_title">Double twist for camera</string>