wifi: remove saePasswordId from getBytesForBackup

getBytesForBackup is used for Softap. Don't need saePasswordId

Bug: 0
Test: unit test, atest frameworks/base/wifi/tests/

Change-Id: Ia85fa65d6a1f939ebd57c20d4c432b6303107b81
diff --git a/wifi/java/android/net/wifi/WifiConfiguration.java b/wifi/java/android/net/wifi/WifiConfiguration.java
index 30c24d3..90343d4 100644
--- a/wifi/java/android/net/wifi/WifiConfiguration.java
+++ b/wifi/java/android/net/wifi/WifiConfiguration.java
@@ -2627,7 +2627,6 @@
         out.writeInt(apBand);
         out.writeInt(apChannel);
         BackupUtils.writeString(out, preSharedKey);
-        BackupUtils.writeString(out, saePasswordId);
         out.writeInt(getAuthType());
         out.writeBoolean(hiddenSSID);
         return baos.toByteArray();
@@ -2651,7 +2650,6 @@
         config.apBand = in.readInt();
         config.apChannel = in.readInt();
         config.preSharedKey = BackupUtils.readString(in);
-        config.saePasswordId = BackupUtils.readString(in);
         config.allowedKeyManagement.set(in.readInt());
         if (version >= 3) {
             config.hiddenSSID = in.readBoolean();