Clear state override when the connection state for it changes.

The SuggestedDeviceManager didn't clear the `suggestedStateOverride`
upon a successful connection in the following scenario:

- `suggestedStateOverride` for device A is set with `STATE_CONNECTING`
- Device B is set as a new suggestion.
- A state for device A changes to `STATE_CONNECTED`

Bug: the connection state check that decides whether to clear
`suggestedStateOverride` was performed on a new suggestion (B) instead
of the suggested state override device itself (A).

Fix: 444612033
Test: atest SuggestedDeviceManagerTest
Test: On a physical device
Flag: com.android.systemui.enable_suggested_device_ui
Change-Id: If1d355f76b375207b1251cf70a05d68da5a3a4e6