Add key to store location changer

Store location changer into Settings.Secure

Modify quick settings to identify itself as location changer

Bug: 68779883
Test: Manual
Change-Id: I2c7a599e1383102685994d876e7160e164436a08
diff --git a/core/tests/coretests/src/android/provider/SettingsBackupTest.java b/core/tests/coretests/src/android/provider/SettingsBackupTest.java
index 225b685..196b4f5 100644
--- a/core/tests/coretests/src/android/provider/SettingsBackupTest.java
+++ b/core/tests/coretests/src/android/provider/SettingsBackupTest.java
@@ -496,6 +496,7 @@
                  Settings.Secure.INPUT_METHODS_SUBTYPE_HISTORY,
                  Settings.Secure.INSTALL_NON_MARKET_APPS,
                  Settings.Secure.LAST_SETUP_SHOWN,
+                 Settings.Secure.LOCATION_CHANGER,
                  Settings.Secure.LOCATION_MODE,
                  Settings.Secure.LOCK_SCREEN_ALLOW_PRIVATE_NOTIFICATIONS, // Candidate?
                  Settings.Secure.LOCK_SCREEN_ALLOW_REMOTE_INPUT, // Candidate?