Fix crash when notification button tapped after service restart

[blackthunder0812]

Summary

• pendingActionsWakeLock was initialized in onDeviceAppeared(), but Android can call onStartCommand() before onDeviceAppeared() when the service is killed and restarted
• Tapping a notification button in this state triggered cancelPendingActionSteps() → UninitializedPropertyAccessException → crash
• Fixed by moving the wake lock initialization to onCreate(), which is always called before onStartCommand()

Root cause

kotlin.UninitializedPropertyAccessException: lateinit property pendingActionsWakeLock has not been initialized
    at AlphaRemoteService.cancelPendingActionSteps(AlphaRemoteService.kt:300)
    at AlphaRemoteService.startCameraAction(AlphaRemoteService.kt:320)
    at AlphaRemoteService.onStartCommand(AlphaRemoteService.kt:236)

Verified on my phone, Oppo A53, Android 12, I think this will also solve #25

🤖 Generated with Claude Code

[Staacks]

Thanks a lot, looks like a clean an simple solution. I wanted to look into the app (and this issue) soon anyway and will do some testing. The companion device service is a mess across different Android versions with very different behaviors in calling the various callback, so I want to test on a few real devices before a release - but I do not see an issue with this PR. When I am back from my family vacation I will look into it.

[Staacks]

Finally did some testing and not surprisingly it works perfectly. Since I have not seen the original bug on any of my devices I cannot say for sure that it fixes it, but I would be surprised if it didn't.

Thanks again. I plan to implement one or two other things from my todo list in the next days (which usually turns our as weeks) and then make a release.