Fix ambient indication displaying when MIGRATE_LOCK_ICON is on

The id of the lock icon was changed here, which can cause the ambient
indication to float to the top of the screen

Flag: MIGRATE_LOCK_ICON
Bug: 305234447
Test: atest DefaultDeviceEntryIconSectionTest.kt
Test: manual - enable MIGRATE_LOCK_ICON and MIGRATE_SPLIT_KEYGUARD_BOTTOM_AREA
Change-Id: I2162118172269e6ce2f3d798b52aca863905d22d