SysUI arch updates for SL composable

1) Moves SecureLockDeviceBiometricAuthContent.kt to correct package
2) Creates and activates viewmodel directly from composable
3) Converts composable dependencies to HydratedActivatable/snapshot state
4) Creates factory for PromptIconViewModel

Flag: android.security.secure_lock_device
Test: EXEMPT cleanup refactor
Bug: 401645997
Change-Id: I15cb79dfdd5ee8fffe599430fccb35d5cba52aed