[Android] backToForeground doesn't work when app is locked.

Bug report

• I've checked the example to reproduce the issue.
  The example doesn't implement backToForeground

• Reproduced on:

• Android

• iOS

Description

Calling backToForeground does not open the app when app is killed and locked. Calling backToForeground on all other states works as expected.

Steps to Reproduce

Force quit your app, lock your device, then wake your app with a notification by calling displayIncomingCall and backToForeground from a headless js task. This will show the incoming call screen, but will not cause your app to start.

Versions

- Callkeep: 4.3.6
- React Native: 0.68.2
- iOS:
- Android: 11
- Phone model: G91S

Logs

02-17 07:23:20.971 24731 24769 D RNCallKeep: [RNCallKeepModule] getInstance : ok
02-17 07:23:20.971 24731 24769 D RNCallKeep: [RNCallKeepModule] constructor
02-17 07:23:20.973 24731 24731 D RNCallKeep: [VoiceConnectionService] startObserving, event count: 0
02-17 07:23:20.974 24731 24769 D RNCallKeep: [RNCallKeepModule] updating react context
02-17 07:23:23.900 24731 24806 D RNCallKeep: [RNCallKeepModule] setup : { NativeMap: {"alertTitle":"Permissions required","alertDescription":"This application needs to access your phone account","cancelButton":"Cancel","okButton":"Ok","foregroundService":{"channelId":"com.autoid.mobile","channelName":"AutoID Mobile"}} }
02-17 07:23:23.900 24731 24806 D RNCallKeep: [VoiceConnectionService] setAvailable: false
02-17 07:23:23.900 24731 24806 D RNCallKeep: [VoiceConnectionService] setInitialized: true
02-17 07:23:23.900 24731 24806 D RNCallKeep: [RNCallKeepModule] setSettings : { NativeMap: {"alertTitle":"Permissions required","alertDescription":"This application needs to access your phone account","cancelButton":"Cancel","okButton":"Ok","foregroundService":{"channelId":"com.autoid.mobile","channelName":"AutoID Mobile"}} }
02-17 07:23:23.901 24731 24806 D RNCallKeep: [RNCallKeepModule] API Version supports self managed, but it is not enabled in setup
02-17 07:23:23.901 24731 24806 D RNCallKeep: [RNCallKeepModule] setSettings : { NativeMap: {"alertTitle":"Permissions required","alertDescription":"This application needs to access your phone account","cancelButton":"Cancel","okButton":"Ok","foregroundService":{"channelId":"com.autoid.mobile","channelName":"AutoID Mobile"}} }
02-17 07:23:23.902 24731 24806 D RNCallKeep: [RNCallKeepModule] registerPhoneAccount
02-17 07:23:23.908 24731 24806 D RNCallKeep: [RNCallKeepModule] registerEvents
02-17 07:23:23.908 24731 24806 D RNCallKeep: [RNCallKeepModule] startObserving, event count: 0
02-17 07:23:23.908 24731 24806 D RNCallKeep: [RNCallKeepModule] startObserving, event count: 0
02-17 07:23:23.908 24731 24806 D RNCallKeep: [VoiceConnectionService] setAvailable: true
02-17 07:23:23.908 24731 24806 D RNCallKeep: [VoiceConnectionService] setInitialized: true
02-17 07:23:23.909 24731 24806 W RNCallKeep: [RNCallKeepModule] checkPhoneAccountPermission error Activity doesn't exist
02-17 07:23:23.909 24731 24806 D RNCallKeep: [VoiceConnectionService] setCanMakeMultipleCalls: false
02-17 07:23:23.937 24731 24806 D RNCallKeep: [RNCallKeepModule] setSettings : { NativeMap: {"alertTitle":"Permissions required","alertDescription":"This application needs to access your phone account","cancelButton":"Cancel","okButton":"Ok","foregroundService":{"channelId":"com.autoid.mobile","channelName":"AutoID Mobile"}} }
02-17 07:23:23.938 24731 24806 D RNCallKeep: [RNCallKeepModule] registerPhoneAccount
02-17 07:23:23.943 24731 24806 D RNCallKeep: [RNCallKeepModule] registerEvents
02-17 07:23:23.943 24731 24806 D RNCallKeep: [RNCallKeepModule] startObserving, event count: 0
02-17 07:23:23.944 24731 24806 D RNCallKeep: [VoiceConnectionService] setAvailable: true
02-17 07:23:23.944 24731 24806 D RNCallKeep: [VoiceConnectionService] setInitialized: true
02-17 07:23:23.947 24731 24806 D RNCallKeep: [RNCallKeepModule] displayIncomingCall, uuid: 99b84aae-3a38-4e70-a3d7-c734d834f4a4, number: 1239, callerName: Ramsay Zoiper, hasVideo: true
02-17 07:23:23.963 24731 24731 D RNCallKeep: [VoiceConnectionService] Constructor
02-17 07:23:23.965 24731 24806 D RNCallKeep: [RNCallKeepModule] backToForeground, app isOpened ?false
02-17 07:23:23.982 24731 24731 D RNCallKeep: [VoiceConnectionService] onCreateIncomingConnection, name:Ramsay Zoiper, numbertel:1239, isForeground: true, isReachable:false, timeout: null
02-17 07:23:23.982 24731 24731 D RNCallKeep: [VoiceConnectionService] createConnection, callerNumber:tel:1239
02-17 07:23:23.987 24731 24731 D RNCallKeep: [VoiceConnectionService] PhoneAccount is not SELF_MANAGED, so connection won't be either
02-17 07:23:23.988 24731 24731 D RNCallKeep: [VoiceConnection] onStateChanged called, state : 0
02-17 07:23:23.988 24731 24731 D RNCallKeep: [VoiceConnection] onStateChanged called, state : 2
02-17 07:23:23.988 24731 24731 D RNCallKeep: [VoiceConnection] onStateChanged called, state : 1
02-17 07:23:23.988 24731 24731 D RNCallKeep: [VoiceConnectionService] startForegroundService
02-17 07:23:23.990 24731 24731 D RNCallKeep: [VoiceConnectionService] Starting foreground service
02-17 07:23:24.816 24731 24731 D RNCallKeep: [VoiceConnection] onCallAudioStateChanged muted :false
02-17 07:23:24.845 24731 24731 D RNCallKeep: [RNCallKeepModule][onReceive] ACTION_DID_CHANGE_AUDIO_ROUTE
02-17 07:23:24.845 24731 24731 V RNCallKeep: [RNCallKeepModule] sendEventToJS, eventName: RNCallKeepDidChangeAudioRoute, bound: true, hasListeners: true args : { NativeMap: {"output":"EARPIECE","callUUID":"99b84aae-3a38-4e70-a3d7-c734d834f4a4","handle":"1239"} }
02-17 07:23:30.850 24731 24731 D RNCallKeep: [VoiceConnection] onReject() executed
02-17 07:23:30.850 24731 24731 D RNCallKeep: [VoiceConnection] onReject executed, rejectReason: 0, replyMessage: null, rejected:false
02-17 07:23:30.851 24731 24731 D RNCallKeep: [VoiceConnection] onStateChanged called, state : 6
02-17 07:23:30.852 24731 24731 D RNCallKeep: [VoiceConnection] onReject executed
02-17 07:23:30.852 24731 24731 D RNCallKeep: [VoiceConnectionService] deinitConnection:99b84aae-3a38-4e70-a3d7-c734d834f4a4
02-17 07:23:30.852 24731 24731 D RNCallKeep: [VoiceConnectionService] stopForegroundService
02-17 07:23:30.858 24731 24731 D RNCallKeep: [RNCallKeepModule][onReceive] ACTION_END_CALL
02-17 07:23:30.859 24731 24731 V RNCallKeep: [RNCallKeepModule] sendEventToJS, eventName: RNCallKeepPerformEndCallAction, bound: true, hasListeners: true args : { NativeMap: {"callUUID":"99b84aae-3a38-4e70-a3d7-c734d834f4a4"} }

Note that the logs are the same as when I test with the app in a killed state but with my device unlocked. If this is the correct behavior, is there any way I can wake my app in the background on Android when a notification is received, the same way iOS VoIP notifications wake up the app in the background?

Trace the Android backToForeground entry point and its interaction with displayIncomingCall when invoked from a headless JS task. Reproduce the reported sequence: force-quit and lock an Android 11 device, then trigger the notification, comparing it with the unlocked case. Done means the app starts in the locked, killed state, or the supported behavior is documented.