Secure FRP : Add a secure bit to know when the device is in secure FRP mode.

Bug: 141262900
Test: atest SettingsProviderTest
Change-Id: Iabc1f699d6afd6a1524b37f992314b9b20463bc2
diff --git a/packages/SettingsProvider/test/src/android/provider/SettingsBackupTest.java b/packages/SettingsProvider/test/src/android/provider/SettingsBackupTest.java
index 289ac80..25483c6 100644
--- a/packages/SettingsProvider/test/src/android/provider/SettingsBackupTest.java
+++ b/packages/SettingsProvider/test/src/android/provider/SettingsBackupTest.java
@@ -685,6 +685,7 @@
                  Settings.Secure.SEARCH_SHORTCUT_REFRESH_MAX_POOL_SIZE,
                  Settings.Secure.SEARCH_SOURCE_TIMEOUT_MILLIS,
                  Settings.Secure.SEARCH_THREAD_KEEPALIVE_SECONDS,
+                 Settings.Secure.SECURE_FRP_MODE,
                  Settings.Secure.SEARCH_WEB_RESULTS_OVERRIDE_LIMIT,
                  Settings.Secure.SELECTED_INPUT_METHOD_SUBTYPE,
                  Settings.Secure.SELECTED_SPELL_CHECKER,  // Intentionally removed in Q