Polished privacy settings

Added footer text to explain the purpose of the Mapbox Metrics setting. Added strings from the plist to an existing unused .strings file and converted that .strings file to UTF-8 for diffability.

ios/app/Settings.bundle/Root.plist

@@ -9,23 +9,9 @@
 			<string>Privacy Settings</string>
 			<key>Type</key>
 			<string>PSGroupSpecifier</string>
+			<key>FooterText</key>
+			<string>This setting allows the application to share anonymized location and usage data with Mapbox.</string>
 		</dict>
-<!--
-        <dict>
-            <key>DefaultValue</key>
-            <true/>
-            <key>Key</key>
-            <string>mapbox_metrics_disabled</string>
-            <key>Title</key>
-            <string>Mapbox Metrics Are Disabled</string>
-            <key>Type</key>
-            <string>PSTitleValueSpecifier</string>
-            <key>TrueValue</key>
-            <true/>
-            <key>FalseValue</key>
-            <false/>
-        </dict>
- -->
 		<dict>
 			<key>DefaultValue</key>
 			<true/>