Revert "Revert "Switch clock face while docked.""

This reverts commit 708e739811328111e40c785e565becb66ed20abd.

Reason for revert: The issue motivating the revert was an earlier presubmit failure for my change.

Change-Id: Icdb7f4dddc5bbee8ce1f54bb8cee550ef0a4639e
Bug: 124252294
diff --git a/core/tests/coretests/src/android/provider/SettingsBackupTest.java b/core/tests/coretests/src/android/provider/SettingsBackupTest.java
index ec57f79..d5865d2 100644
--- a/core/tests/coretests/src/android/provider/SettingsBackupTest.java
+++ b/core/tests/coretests/src/android/provider/SettingsBackupTest.java
@@ -620,6 +620,7 @@
                  Settings.Secure.DISABLED_PRINT_SERVICES,
                  Settings.Secure.DISABLED_SYSTEM_INPUT_METHODS,
                  Settings.Secure.DISPLAY_DENSITY_FORCED,
+                 Settings.Secure.DOCKED_CLOCK_FACE,
                  Settings.Secure.DOZE_PULSE_ON_LONG_PRESS,
                  Settings.Secure.EMERGENCY_ASSISTANCE_APPLICATION,
                  Settings.Secure.ENABLED_INPUT_METHODS,  // Intentionally removed in P