Adds Blur and BlurFallback styles for All Apps.

Technically these styles can be used throughout Launcher, e.g.
Widget Picker and Folders, but this CL only applies it to All Apps.

At a high level, views wishing to apply transparency to show blur
should use these new attr values rather than colors directly.

When blur changes, e.g. starting or stopping battery saver, the
style is re-applied and revelant views are invalidated. For
Launcher, this is handled by DepthController, and for Taskbar it's
handled by a CrossWindowBlurListener.

Also updated the Private Space animation slightly to account for
the translucent decorators (specifically, we can't use the mask
view to cover them when blur is enabled).

Screenshots: https://drive.google.com/drive/folders/1tU472KHotgEBpT-Ec9VOBWPBf_YdVqv2?resourcekey=0-ebf7W8O6iDJ4UVMtRzTABg&usp=sharing
Private Space animations: https://drive.google.com/file/d/1h5pn8Xb17TPcbujr7uSAJNTq8kwNZoIp/view?usp=drive_link&resourcekey=0-TzpaJ16Gg8_QJctBx4oiIg
Private Space QS Tile animations: https://drive.google.com/file/d/1dCuqnqd5z2kSBEakGobMlEkMwFDBWRbJ/view?usp=drive_link&resourcekey=0-qRVFPb-a6OzaZQOf4x86Jw

Bug: 371343636
Test: Manual
Flag: com.android.launcher3.all_apps_blur
Change-Id: Ia9f581f50d1adc0830569656bdeb751deb710a9c

src/com/android/launcher3/allapps/PrivateProfileManager.java

@@ -203,8 +203,7 @@ public class PrivateProfileManager extends UserProfileManager {
 
         BaseAllAppsAdapter.AdapterItem item = new BaseAllAppsAdapter.AdapterItem(VIEW_TYPE_ICON);
         item.itemInfo = itemInfo;
-        item.decorationInfo = new SectionDecorationInfo(context, ROUND_NOTHING,
-                /* decorateTogether */ true);
+        item.decorationInfo = new SectionDecorationInfo(context, ROUND_NOTHING);
 
         adapterItems.add(item);
         mAllApps.mAH.get(MAIN).mAdapter.notifyItemInserted(adapterItems.size() - 1);
@@ -224,9 +223,7 @@ public class PrivateProfileManager extends UserProfileManager {
     }
 
     /**
-     * Resets the current state of Private Profile, w.r.t. to Launcher. The decorator should only
-     * be applied upon expand before animating. When collapsing, reset() will remove the decorator
-     * when animation is not running.
+     * Resets the current state of Private Profile, w.r.t. to Launcher.
      */
     public void reset() {
         Trace.beginSection("PrivateProfileManager#reset");
@@ -248,7 +245,7 @@ public class PrivateProfileManager extends UserProfileManager {
         } else if (previousState == STATE_ENABLED && updatedState == STATE_DISABLED){
             executeLock();
         }
-        addPrivateSpaceDecorator(updatedState);
+        addPrivateSpaceDecorator();
         Trace.endSection();
     }
 
@@ -282,26 +279,24 @@ public class PrivateProfileManager extends UserProfileManager {
         setPrivateSpaceSettingsAvailable(apiWrapper.getPrivateSpaceSettingsIntent() != null);
     }
 
-    /** Adds a private space decorator only when STATE_ENABLED. */
+    /** Adds a private space decorator to the main (personal) app recyclerview. */
     @VisibleForTesting
-    void addPrivateSpaceDecorator(int updatedState) {
+    void addPrivateSpaceDecorator() {
         ActivityAllAppsContainerView<?>.AdapterHolder mainAdapterHolder = mAllApps.mAH.get(MAIN);
-        if (updatedState == STATE_ENABLED) {
-            // Create a new decorator instance if not already available.
-            if (mPrivateAppsSectionDecorator == null) {
-                mPrivateAppsSectionDecorator = new PrivateAppsSectionDecorator(
-                        mainAdapterHolder.mAppsList);
-            }
-            for (int i = 0; i < mainAdapterHolder.mRecyclerView.getItemDecorationCount(); i++) {
-                if (mainAdapterHolder.mRecyclerView.getItemDecorationAt(i)
-                        .equals(mPrivateAppsSectionDecorator)) {
-                    // No need to add another decorator if one is already present in recycler view.
-                    return;
-                }
-            }
-            // Add Private Space Decorator to the Recycler view.
-            mainAdapterHolder.mRecyclerView.addItemDecoration(mPrivateAppsSectionDecorator);
+        // Create a new decorator instance if not already available.
+        if (mPrivateAppsSectionDecorator == null) {
+            mPrivateAppsSectionDecorator = new PrivateAppsSectionDecorator(
+                    mainAdapterHolder.mAppsList);
         }
+        for (int i = 0; i < mainAdapterHolder.mRecyclerView.getItemDecorationCount(); i++) {
+            if (mainAdapterHolder.mRecyclerView.getItemDecorationAt(i)
+                    .equals(mPrivateAppsSectionDecorator)) {
+                // No need to add another decorator if one is already present in recycler view.
+                return;
+            }
+        }
+        // Add Private Space Decorator to the Recycler view.
+        mainAdapterHolder.mRecyclerView.addItemDecoration(mPrivateAppsSectionDecorator);
     }
 
     public void setQuietMode(boolean enable) {
@@ -440,7 +435,7 @@ public class PrivateProfileManager extends UserProfileManager {
         setQuietMode(lock);
     }
 
-    /** Finds the private space header to scroll to and set the private space icons to GONE. */
+    /** Finds the private space header to smooth scroll to. */
     private void collapse() {
         AllAppsRecyclerView allAppsRecyclerView = mAllApps.getActiveRecyclerView();
         List<BaseAllAppsAdapter.AdapterItem> appListAdapterItems =
@@ -463,23 +458,9 @@ public class PrivateProfileManager extends UserProfileManager {
                 RecyclerView.LayoutManager layoutManager = allAppsRecyclerView.getLayoutManager();
                 if (layoutManager != null) {
                     startAnimationScroll(allAppsRecyclerView, layoutManager, smoothScroller);
-                    // Preserve decorator if floating mask view exists.
-                    if (mFloatingMaskView == null) {
-                        currentItem.decorationInfo = null;
-                    }
                 }
                 break;
             }
-            // Make the private space apps gone to "collapse".
-            if ((mFloatingMaskView == null && isPrivateSpaceItem(currentItem)) ||
-                    currentItem.viewType == VIEW_TYPE_PRIVATE_SPACE_SYS_APPS_DIVIDER) {
-                RecyclerView.ViewHolder viewHolder =
-                        allAppsRecyclerView.findViewHolderForAdapterPosition(i);
-                if (viewHolder != null) {
-                    viewHolder.itemView.setVisibility(GONE);
-                    currentItem.decorationInfo = null;
-                }
-            }
         }
     }
 
@@ -695,8 +676,6 @@ public class PrivateProfileManager extends UserProfileManager {
                     + mPrivateSpaceSettingsButton.getVisibility()
                     + " settingsCogAlpha: " + mPrivateSpaceSettingsButton.getAlpha());
             if (!expand) {
-                mAllApps.mAH.get(MAIN).mRecyclerView.removeItemDecoration(
-                        mPrivateAppsSectionDecorator);
                 // Call onAppsUpdated() because it may be canceled when this animation occurs.
                 if (!Utilities.isRunningInTestHarness()) {
                     mAllApps.getPersonalAppList().onAppsUpdated();
@@ -861,7 +840,8 @@ public class PrivateProfileManager extends UserProfileManager {
     }
 
     private void attachFloatingMaskView(boolean expand) {
-        if (!Flags.privateSpaceAddFloatingMaskView()) {
+        // Floating mask can't block the transparent background if blur is enabled, so don't add it.
+        if (!Flags.privateSpaceAddFloatingMaskView() || mAllApps.isBackgroundBlurEnabled()) {
             return;
         }
         // Use getLocationOnScreen() as simply checking for mPSHeader.getBottom() is only relative