Update pull back animation for tablet AllApps

- This is a follow-up of http://ag/17636490
- Introduced animation property specifically for pullback translation and alpha, which will invoke getRecyclerViewContainer directly on tablet, and invoke aggregate setter of appsView on phones
- Delay reset of pullback animation to after dismiss animation to avoid jump in value during state transition animation
- Introduced property factory for addictive properties similar to MultiScalePropertyFactory

Fix: 220345008
Test: manual on small and large screen
Change-Id: I7b5c0019c1d4d36c3c7ca4ec79e38e4eb09c32ca

src/com/android/launcher3/util/MultiAdditivePropertyFactory.java

@@ -0,0 +1,115 @@
+/*
+ * 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.launcher3.util;
+
+import android.util.ArrayMap;
+import android.util.FloatProperty;
+import android.util.Log;
+import android.util.Property;
+import android.view.View;
+
+/**
+ * Allows to combine multiple values set by several sources.
+ *
+ * The various sources are meant to use [set], providing different `setterIndex` params. When it is
+ * not set, 0 is used. This is meant to cover the case multiple animations are going on at the same
+ * time.
+ *
+ * This class behaves similarly to [MultiValueAlpha], but is meant to be more abstract and reusable.
+ * It sets the addition of all values.
+ *
+ * @param <T> Type where to apply the property.
+ */
+public class MultiAdditivePropertyFactory<T extends View> {
+
+    private static final boolean DEBUG = false;
+    private static final String TAG = "MultiAdditivePropertyFactory";
+    private final String mName;
+    private final ArrayMap<Integer, MultiAdditiveProperty> mProperties =
+            new ArrayMap<>();
+
+    // This is an optimization for cases when set is called repeatedly with the same setterIndex.
+    private float mAggregationOfOthers = 0f;
+    private Integer mLastIndexSet = -1;
+    private final Property<View, Float> mProperty;
+
+    public MultiAdditivePropertyFactory(String name, Property<View, Float> property) {
+        mName = name;
+        mProperty = property;
+    }
+
+    /** Returns the [MultiFloatProperty] associated with [inx], creating it if not present. */
+    public MultiAdditiveProperty get(Integer index) {
+        return mProperties.computeIfAbsent(index,
+                (k) -> new MultiAdditiveProperty(index, mName + "_" + index));
+    }
+
+    /**
+     * Each [setValue] will be aggregated with the other properties values created by the
+     * corresponding factory.
+     */
+    class MultiAdditiveProperty extends FloatProperty<T> {
+        private final int mInx;
+        private float mValue = 0f;
+
+        MultiAdditiveProperty(int inx, String name) {
+            super(name);
+            mInx = inx;
+        }
+
+        @Override
+        public void setValue(T obj, float newValue) {
+            if (mLastIndexSet != mInx) {
+                mAggregationOfOthers = 0f;
+                mProperties.forEach((key, property) -> {
+                    if (key != mInx) {
+                        mAggregationOfOthers += property.mValue;
+                    }
+                });
+                mLastIndexSet = mInx;
+            }
+            float lastAggregatedValue = mAggregationOfOthers + newValue;
+            mValue = newValue;
+            apply(obj, lastAggregatedValue);
+
+            if (DEBUG) {
+                Log.d(TAG, "name=" + mName
+                        + " newValue=" + newValue + " mInx=" + mInx
+                        + " aggregated=" + lastAggregatedValue + " others= " + mProperties);
+            }
+        }
+
+        @Override
+        public Float get(T view) {
+            // The scale of the view should match mLastAggregatedValue. Still, if it has been
+            // changed without using this property, it can differ. As this get method is usually
+            // used to set the starting point on an animation, this would result in some jumps
+            // when the view scale is different than the last aggregated value. To stay on the
+            // safe side, let's return the real view scale.
+            return mProperty.get(view);
+        }
+
+        @Override
+        public String toString() {
+            return String.valueOf(mValue);
+        }
+    }
+
+    protected void apply(View view, float value) {
+        mProperty.set(view, value);
+    }
+}