Adjust download-on-wifi preference to match iOS

Affects: https://ebce-lyrasis.atlassian.net/browse/PP-3971

Author: io7m

palace-ui/src/main/java/org/nypl/simplified/ui/settings/SettingsMainFragment3.kt

@@ -166,9 +166,6 @@ class SettingsMainFragment3 : PreferenceFragmentCompat() {
     profiles: ProfilesControllerType,
     profilePrefs: ProfilePreferences
   ) {
-    val context =
-      this.requireContext()
-
     if (profilePrefs.downloadOnlyOnWIFI) {
       downloadSwitch.isChecked = true
     } else {

palace-ui/src/main/res/values/stringsSettings.xml

@@ -83,9 +83,8 @@
     <string name="settingsNotificationsEnabled">Notifications are enabled.\nDisabling notifications will restart the application.</string>
     <string name="settingsNotificationsDisabled">Notifications are disabled.</string>
     <string name="settingsNetwork">Network</string>
-    <string name="settingsNetworkWIFIOnly">Only download books when Wi-Fi is available.</string>
-    <string name="settingsNetworkWIFIOnlyEnabled">Download only on Wi-Fi.</string>
-    <string name="settingsNetworkWIFIOnlyDisabled">Download when any network is available.</string>
+    <string name="settingsNetworkDownloadWIFI">Download Only on Wi-Fi</string>
+    <string name="settingsNetworkWIFIOnlyEnabled">When enabled, books and audiobooks will only download over Wi-Fi. Downloads will be blocked on cellular data.</string>
     <string name="settingsAccessibilitySearchButton">Library Search Button</string>
     <string name="settingsAccessibilitySearchButtonClose">Close Search Button</string>
 </resources>

palace-ui/src/main/res/xml/settings.xml

@@ -16,11 +16,13 @@
             android:title="@string/settingsNotificationsEnabled" />
     </PreferenceCategory>
 
-    <SwitchPreferenceCompat
-        android:summaryOff="@string/settingsNetworkWIFIOnlyDisabled"
-        android:summaryOn="@string/settingsNetworkWIFIOnlyEnabled"
-        android:key="settingsNetworkDownloadWIFIOnly"
-        android:title="@string/settingsNetwork" />
+    <PreferenceCategory android:title="@string/settingsNetwork">
+        <SwitchPreferenceCompat
+            app:singleLineTitle="false"
+            android:summary="@string/settingsNetworkWIFIOnlyEnabled"
+            android:key="settingsNetworkDownloadWIFIOnly"
+            android:title="@string/settingsNetworkDownloadWIFI" />
+    </PreferenceCategory>
 
     <PreferenceCategory android:title="@string/settingsDocumentation">
         <Preference