Add wifi throttling to backup blacklist.

Test: Ran SettingsBackupTest test.

Bug: 37684646

Change-Id: I3cd2e30fc6736f36b8569400941a3128e06d2f48
diff --git a/core/tests/coretests/src/android/provider/SettingsBackupTest.java b/core/tests/coretests/src/android/provider/SettingsBackupTest.java
index 99909ac..ab9a929 100644
--- a/core/tests/coretests/src/android/provider/SettingsBackupTest.java
+++ b/core/tests/coretests/src/android/provider/SettingsBackupTest.java
@@ -369,6 +369,8 @@
                     Settings.Global.WIFI_REENABLE_DELAY_MS,
                     Settings.Global.WIFI_SAVED_STATE,
                     Settings.Global.WIFI_SCAN_ALWAYS_AVAILABLE,
+                    Settings.Global.WIFI_SCAN_BACKGROUND_THROTTLE_INTERVAL_MS,
+                    Settings.Global.WIFI_SCAN_BACKGROUND_THROTTLE_PACKAGE_WHITELIST,
                     Settings.Global.WIFI_SCAN_INTERVAL_WHEN_P2P_CONNECTED_MS,
                     Settings.Global.WIFI_SLEEP_POLICY,
                     Settings.Global.WIFI_SUPPLICANT_SCAN_INTERVAL_MS,