Maintain focus on switch for a11y

Modified subsetting where user can toggle
if an app should be able to modify system
settings so that talkback announces state
change properly.

Test: Accessibility Scanner, Manual Verification
Bug: 31755538
Change-Id: I54ad016b5edb0937b77cfdeef0cfcae24a78e2a2

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

@@ -142,8 +142,9 @@ public class WriteSettingsDetails extends AppInfoWithHeader implements OnPrefere
         // you can't ask a user for a permission you didn't even declare!
         mSwitchPref.setEnabled(mWriteSettingsState.permissionDeclared);
         mWriteSettingsPrefs.setEnabled(canWrite);
-        getPreferenceScreen().removePreference(mWriteSettingsPrefs);
-
+        if (getPreferenceScreen().findPreference(KEY_APP_OPS_SETTINGS_PREFS) != null) {
+            getPreferenceScreen().removePreference(mWriteSettingsPrefs);
+        }
         return true;
     }