[Growth]: Broadcast when the device has entered directly

This cl sends a broadcast to the growth app when the device has entered
directly. The growth app can use this signal to start its flow.

Bug: 410857267
Flag: com.android.systemui.enable_desktop_growth
Test: Added new device less tests.
Change-Id: Ia03d8c562a2cc4b607600b99d7ecb7deed8cd02d