Migrate lib icons to xml drawables

[AndyScherzinger]

With androidx.compose.material3:material3 to v1.4.0 #5414 Google removed the icon library dependency (also deprecated) and alsol see https://developer.android.com/jetpack/androidx/releases/compose-material3#1.4.0 for details.

So with d7fd88a I added the legacy fallback for a quick merge but in the mid-term we should replace the calls by using xml drawable in the apps Composables classes, like

ImageVector.vectorResource(R.drawable.ic_our_icon)