Rename some biometrics things since it's no longer specifically for biometric auth

app/src/main/java/eu/kanade/tachiyomi/ui/security/SecureActivityDelegate.kt

@@ -5,7 +5,7 @@ import android.view.WindowManager
 import androidx.fragment.app.FragmentActivity
 import androidx.lifecycle.lifecycleScope
 import eu.kanade.tachiyomi.data.preference.PreferencesHelper
-import eu.kanade.tachiyomi.util.system.BiometricUtil
+import eu.kanade.tachiyomi.util.system.AuthenticatorUtil
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
 import uy.kohesive.injekt.injectLazy
@@ -28,14 +28,14 @@ class SecureActivityDelegate(private val activity: FragmentActivity) {
     }
 
     fun onResume() {
-        if (preferences.useBiometricLock().get()) {
-            if (BiometricUtil.isSupported(activity)) {
+        if (preferences.useAuthenticator().get()) {
+            if (AuthenticatorUtil.isSupported(activity)) {
                 if (isAppLocked()) {
-                    activity.startActivity(Intent(activity, BiometricUnlockActivity::class.java))
+                    activity.startActivity(Intent(activity, UnlockActivity::class.java))
                     activity.overridePendingTransition(0, 0)
                 }
             } else {
-                preferences.useBiometricLock().set(false)
+                preferences.useAuthenticator().set(false)
             }
         }
     }

app/src/main/java/eu/kanade/tachiyomi/ui/security/UnlockActivity.kt

@@ -4,7 +4,7 @@ import android.os.Bundle
 import androidx.biometric.BiometricPrompt
 import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.ui.base.activity.BaseThemedActivity
-import eu.kanade.tachiyomi.util.system.BiometricUtil
+import eu.kanade.tachiyomi.util.system.AuthenticatorUtil
 import timber.log.Timber
 import java.util.Date
 import java.util.concurrent.Executors
@@ -12,7 +12,7 @@ import java.util.concurrent.Executors
 /**
  * Blank activity with a BiometricPrompt.
  */
-class BiometricUnlockActivity : BaseThemedActivity() {
+class UnlockActivity : BaseThemedActivity() {
 
     private val executor = Executors.newSingleThreadExecutor()
 
@@ -40,10 +40,10 @@ class BiometricUnlockActivity : BaseThemedActivity() {
 
         var promptInfo = BiometricPrompt.PromptInfo.Builder()
             .setTitle(getString(R.string.unlock_app))
-            .setAllowedAuthenticators(BiometricUtil.getSupportedAuthenticators(this))
+            .setAllowedAuthenticators(AuthenticatorUtil.getSupportedAuthenticators(this))
             .setConfirmationRequired(false)
 
-        if (!BiometricUtil.isDeviceCredentialAllowed(this)) {
+        if (!AuthenticatorUtil.isDeviceCredentialAllowed(this)) {
             promptInfo = promptInfo.setNegativeButtonText(getString(R.string.action_cancel))
         }