Apply FooterPreference to the sub-pages of Special app access

Affected pages:
- Display over other apps
- Modify system settings
- Picture-in-picture
- Install unknown apps
- Usage access
- Wi-Fi control

Bug: 179234542
Test: robotests & visual
Change-Id: Icac09d0cf2b92cb5b74a8c5629e211108a78cdb0

res/xml/app_ops_permissions_details.xml

@@ -20,7 +20,7 @@
     <com.android.settings.widget.FilterTouchesSwitchPreference
         android:key="app_ops_settings_switch" />
 
-    <Preference
+    <com.android.settingslib.widget.FooterPreference
         android:key="app_ops_settings_description"
         android:selectable="false" />
 

res/xml/change_wifi_state_details.xml

@@ -22,9 +22,9 @@
       android:key="app_ops_settings_switch"
       android:title="@string/change_wifi_state_app_detail_switch"/>
 
-  <Preference
+  <com.android.settingslib.widget.FooterPreference
       android:key="app_ops_settings_preference"
-      android:summary="@string/change_wifi_state_app_detail_summary"
+      android:title="@string/change_wifi_state_app_detail_summary"
       android:selectable="false"/>
 
 </PreferenceScreen>

res/xml/draw_overlay_permissions_details.xml

@@ -22,8 +22,8 @@
         android:key="app_ops_settings_switch"
         android:title="@string/permit_draw_overlay"/>
 
-    <Preference
-        android:summary="@string/allow_overlay_description"
+    <com.android.settingslib.widget.FooterPreference
+        android:title="@string/allow_overlay_description"
         android:selectable="false"/>
 
 </PreferenceScreen>

res/xml/external_sources_details.xml

@@ -21,9 +21,9 @@
         android:key="external_sources_settings_switch"
         android:title="@string/external_source_switch_title" />
 
-    <Preference
+    <com.android.settingslib.widget.FooterPreference
         android:key="external_sources_settings_description"
-        android:summary="@string/install_all_warning"
+        android:title="@string/install_all_warning"
         android:selectable="false" />
 
 </PreferenceScreen>

res/xml/picture_in_picture_permissions_details.xml

@@ -22,8 +22,8 @@
         android:key="app_ops_settings_switch"
         android:title="@string/picture_in_picture_app_detail_switch"/>
 
-    <Preference
-        android:summary="@string/picture_in_picture_app_detail_summary"
+    <com.android.settingslib.widget.FooterPreference
+        android:title="@string/picture_in_picture_app_detail_summary"
         android:selectable="false"/>
 
 </PreferenceScreen>

res/xml/write_system_settings_permissions_details.xml

@@ -22,8 +22,8 @@
         android:key="app_ops_settings_switch"
         android:title="@string/permit_write_settings"/>
 
-    <Preference
-        android:summary="@string/write_settings_description"
+    <com.android.settingslib.widget.FooterPreference
+        android:title="@string/write_settings_description"
         android:selectable="false"/>
 
 </PreferenceScreen>

src/com/android/settings/applications/UsageAccessDetails.java

@@ -74,7 +74,7 @@ public class UsageAccessDetails extends AppInfoWithHeader implements OnPreferenc
 
         getPreferenceScreen().setTitle(R.string.usage_access);
         mSwitchPref.setTitle(R.string.permit_usage_access);
-        mUsageDesc.setSummary(R.string.usage_access_description);
+        mUsageDesc.setTitle(R.string.usage_access_description);
 
         mSwitchPref.setOnPreferenceChangeListener(this);