Add Enterprise restriction check for Wi-Fi QR code sharing

- In the Internet Picker, if a user tries to long press on the SSIDs
   that cannot be shared, the “Share” option should disappear.

Bug: 203169712
Test: make RunSettingsRoboTests ROBOTEST_FILTER=NetworkProviderSettingsTest
Change-Id: Iea5a25ba80f29be59c39988bba0dcc4689585461

src/com/android/settings/network/NetworkProviderSettings.java

@@ -566,7 +566,9 @@ public class NetworkProviderSettings extends RestrictedSettingsFragment
         }
 
         if (mSelectedWifiEntry.canDisconnect()) {
-            menu.add(Menu.NONE, MENU_ID_SHARE, 0 /* order */, R.string.share);
+            if (mSelectedWifiEntry.canShare()) {
+                menu.add(Menu.NONE, MENU_ID_SHARE, 0 /* order */, R.string.share);
+            }
             menu.add(Menu.NONE, MENU_ID_DISCONNECT, 1 /* order */,
                     R.string.wifi_disconnect_button_text);
         }