Update preference screen as per design

vector/src/main/res/values/strings.xml

@@ -773,6 +773,8 @@
     <string name="settings_ignored_users">Ignored users</string>
     <string name="settings_other">Other</string>
     <string name="settings_advanced">Advanced</string>
+    <string name="settings_integrations">Integrations</string>
+    <string name="settings_integrations_summary">Use an Integration Manager to manage bots, bridges, widgets and sticker packs.\nIntegration Managers receive configuration data, and can modify widgets, send room invites and set power levels on your behalf.</string>
     <string name="settings_cryptography">Cryptography</string>
     <string name="settings_cryptography_manage_keys">Cryptography Keys Management</string>
     <string name="settings_notifications_targets">Notification Targets</string>
@@ -839,7 +841,7 @@
     <string name="settings_logged_in">Logged in as</string>
     <string name="settings_home_server">Home Server</string>
     <string name="settings_identity_server">Identity Server</string>
-    <string name="settings_integration_allow">Enable Integration Manager</string>
+    <string name="settings_integration_allow">Allow integrations</string>
     <string name="settings_integration_manager">Integration Manager</string>
 
     <string name="settings_user_interface">User interface</string>

vector/src/main/res/xml/vector_settings_preferences.xml

@@ -446,19 +446,28 @@
             tools:summary="@string/default_identity_server_url"
             app:fragment="im.vector.fragments.discovery.VectorSettingsDiscoveryFragment" />
 
+    </im.vector.preference.VectorPreferenceCategory>
+
+    <im.vector.preference.VectorPreferenceDivider />
+
+    <im.vector.preference.VectorPreferenceCategory android:title="@string/settings_integrations">
+
+        <im.vector.preference.VectorPreference
+            android:focusable="false"
+            android:persistent="false"
+            android:summary="@string/settings_integrations_summary" />
 
         <im.vector.preference.VectorSwitchPreference
             android:key="SETTINGS_INTEGRATION_ALLOW"
             android:enabled="true"
             android:persistent="false"
-            android:title="@string/settings_integration_allow" />
+            android:title="@string/settings_integration_allow"/>
 
         <im.vector.preference.VectorPreference
             android:dependency="SETTINGS_INTEGRATION_ALLOW"
             android:persistent="false"
             android:key="SETTINGS_INTEGRATION_MANAGER_UI_URL"
             android:title="@string/settings_integration_manager" />
-
     </im.vector.preference.VectorPreferenceCategory>
 
     <im.vector.preference.VectorPreferenceDivider />