Refactor FingerprintEnrollFindSensor

Refactor FingerprintEnrollFindSensor to 3 pages for different sensor
types, and apply MVVM for them.

Bug: 259664912
Bug: 260957195
Bug: 260957816
Test: atest FingerprintRepositoryTest FingerprintEnrollmentActivityTest
      AutoCredentialViewModelTest FingerprintEnrollIntroViewModelTest

Change-Id: Iace790952567cac13e61e5175e90555d4da7dfe2

src/com/android/settings/biometrics2/ui/viewmodel/DeviceRotationViewModel.java

@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.biometrics2.ui.viewmodel;
+
+import static android.hardware.display.DisplayManager.DisplayListener;
+
+import android.app.Application;
+import android.hardware.display.DisplayManager;
+import android.util.Log;
+import android.view.DisplayInfo;
+import android.view.Surface;
+
+import androidx.annotation.NonNull;
+import androidx.lifecycle.AndroidViewModel;
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
+
+/**
+ * ViewModel explaining the fingerprint sensor location for fingerprint enrollment.
+ */
+public class DeviceRotationViewModel extends AndroidViewModel {
+
+    private static final boolean DEBUG = false;
+    private static final String TAG = "RotationViewModel";
+
+    private final DisplayManager mDisplayManager;
+    @NonNull private final DisplayInfo mDisplayInfo = new DisplayInfo();
+    private final DisplayListener mDisplayListener = new DisplayListener() {
+        @Override
+        public void onDisplayAdded(int displayId) {
+        }
+
+        @Override
+        public void onDisplayRemoved(int displayId) {
+        }
+
+        @Override
+        public void onDisplayChanged(int displayId) {
+            final int rotation = getRotation();
+            if (DEBUG) {
+                Log.d(TAG, "onDisplayChanged(" + displayId + "), rotation:" + rotation);
+            }
+            mLiveData.postValue(rotation);
+        }
+    };
+
+    @NonNull private final MutableLiveData<Integer> mLiveData =
+            new MutableLiveData<>(getRotation());
+
+    public DeviceRotationViewModel(@NonNull Application application) {
+        super(application);
+        mDisplayManager = application.getSystemService(DisplayManager.class);
+        mDisplayManager.registerDisplayListener(mDisplayListener,
+                application.getMainThreadHandler());
+    }
+
+    /**
+     * Returns current rotation
+     */
+    @Surface.Rotation
+    private int getRotation() {
+        getApplication().getDisplay().getDisplayInfo(mDisplayInfo);
+        return mDisplayInfo.rotation;
+    }
+
+    /**
+     * Returns RotationLiveData
+     */
+    public LiveData<Integer> getLiveData() {
+        return mLiveData;
+    }
+
+    @Override
+    protected void onCleared() {
+        mDisplayManager.unregisterDisplayListener(mDisplayListener);
+        super.onCleared();
+    }
+}