WifiNetworkSuggestion: Add setOemPaid flag

Also, plumb the flag to WifiInfo.

Bug: 169413079
Test: atest android.net.wifi
Change-Id: Ic38dae4e2436937db0fb682bf204785cd181d159
diff --git a/wifi/api/system-current.txt b/wifi/api/system-current.txt
index fd45ebe..0b56514 100644
--- a/wifi/api/system-current.txt
+++ b/wifi/api/system-current.txt
@@ -608,10 +608,12 @@
 
   public final class WifiNetworkSuggestion implements android.os.Parcelable {
     method @NonNull public android.net.wifi.WifiConfiguration getWifiConfiguration();
+    method public boolean isOemPaid();
   }
 
   public static final class WifiNetworkSuggestion.Builder {
     method @NonNull @RequiresPermission(android.Manifest.permission.NETWORK_CARRIER_PROVISIONING) public android.net.wifi.WifiNetworkSuggestion.Builder setCarrierId(int);
+    method @NonNull public android.net.wifi.WifiNetworkSuggestion.Builder setOemPaid(boolean);
   }
 
   public class WifiScanner {