Pno list recency optimization: Settings.global flag

Add a flag to enable/disable this feature

Bug: 75956033
Test: compile, unit test
Change-Id: Id83493979d01451f10eec527e1cc4d8703232417
diff --git a/core/tests/coretests/src/android/provider/SettingsBackupTest.java b/core/tests/coretests/src/android/provider/SettingsBackupTest.java
index 4980210..ac6cc65 100644
--- a/core/tests/coretests/src/android/provider/SettingsBackupTest.java
+++ b/core/tests/coretests/src/android/provider/SettingsBackupTest.java
@@ -487,6 +487,7 @@
                     Settings.Global.WIFI_IS_UNUSABLE_EVENT_METRICS_ENABLED,
                     Settings.Global.WIFI_LINK_SPEED_METRICS_ENABLED,
                     Settings.Global.WIFI_PNO_FREQUENCY_CULLING_ENABLED,
+                    Settings.Global.WIFI_PNO_RECENCY_SORTING_ENABLED,
                     Settings.Global.WIFI_MAX_DHCP_RETRY_COUNT,
                     Settings.Global.WIFI_MOBILE_DATA_TRANSITION_WAKELOCK_TIMEOUT_MS,
                     Settings.Global.WIFI_NETWORK_SHOW_RSSI,