Convert RTT background throttle to a settable value (1/2).

Bug: 69323456
Test: Manual test. Unit tests with runtest.sh.
Change-Id: I7dd3efc0ef3f0a12303f927da134abbd2383deb6
diff --git a/core/tests/coretests/src/android/provider/SettingsBackupTest.java b/core/tests/coretests/src/android/provider/SettingsBackupTest.java
index 43e980e..735cfe4 100644
--- a/core/tests/coretests/src/android/provider/SettingsBackupTest.java
+++ b/core/tests/coretests/src/android/provider/SettingsBackupTest.java
@@ -465,6 +465,7 @@
                     Settings.Global.WIFI_ON,
                     Settings.Global.WIFI_P2P_DEVICE_NAME,
                     Settings.Global.WIFI_REENABLE_DELAY_MS,
+                    Settings.Global.WIFI_RTT_BACKGROUND_EXEC_GAP_MS,
                     Settings.Global.WIFI_SAVED_STATE,
                     Settings.Global.WIFI_SCAN_ALWAYS_AVAILABLE,
                     Settings.Global.WIFI_SCAN_INTERVAL_WHEN_P2P_CONNECTED_MS,