Fix Settings UI reactivity, resolve compiler warnings, update .gitignore

- Make screen capture permission and battery optimization states reactive
- Add lifecycle observer to refresh battery status on resume
- Add lifecycle-runtime-compose dependency for non-deprecated LocalLifecycleOwner
- Replace deprecated LocalLifecycleOwner import
- Remove unused REQUEST_CODE constant
- Use KTX createBitmap() and bitmap[x,y] extensions
- Add misc.xml and junie.xml to .gitignore

android/.gitignore

@@ -7,6 +7,8 @@
 /.idea/workspace.xml
 /.idea/navEditor.xml
 /.idea/assetWizardSettings.xml
+/.idea/misc.xml
+/.idea/junie.xml
 .DS_Store
 /build
 /captures