Adds all_apps_sheet_for_handheld flag.

This flag causes All Apps to render on a background panel in
handheld mode similarly to how it does on tablets.

Demo: https://drive.google.com/file/d/11K8yueTb9Xr8oRJCM3TxcFH8V3rRFJrJ/view?usp=sharing&resourcekey=0-hMNEGzMQ5KC9D7may2Gb-g

Bug: 374186088
Bug: 372618421
Test: Manual
Flag: com.android.launcher3.all_apps_sheet_for_handheld
Change-Id: Ie0b1e784d4330fd71f7f36f39e5dd85e8ee14933

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

@@ -47,7 +47,6 @@ import android.os.Parcelable;
 import android.os.Process;
 import android.os.UserManager;
 import android.util.AttributeSet;
-import android.util.FloatProperty;
 import android.util.Log;
 import android.util.SparseArray;
 import android.view.KeyEvent;
@@ -115,19 +114,6 @@ public class ActivityAllAppsContainerView<T extends Context & ActivityContext>
         ScrimView.ScrimDrawingController {
 
 
-    public static final FloatProperty<ActivityAllAppsContainerView<?>> BOTTOM_SHEET_ALPHA =
-            new FloatProperty<>("bottomSheetAlpha") {
-                @Override
-                public Float get(ActivityAllAppsContainerView<?> containerView) {
-                    return containerView.mBottomSheetAlpha;
-                }
-
-                @Override
-                public void setValue(ActivityAllAppsContainerView<?> containerView, float v) {
-                    containerView.setBottomSheetAlpha(v);
-                }
-            };
-
     public static final float PULL_MULTIPLIER = .02f;
     public static final float FLING_VELOCITY_MULTIPLIER = 1200f;
     protected static final String BUNDLE_KEY_CURRENT_PAGE = "launcher.allapps.current_page";
@@ -191,8 +177,6 @@ public class ActivityAllAppsContainerView<T extends Context & ActivityContext>
     private ScrimView mScrimView;
     private int mHeaderColor;
     private int mBottomSheetBackgroundColor;
-    private float mBottomSheetAlpha = 1f;
-    private boolean mForceBottomSheetVisible;
     private int mTabsProtectionAlpha;
     @Nullable private AllAppsTransitionController mAllAppsTransitionController;
 
@@ -351,20 +335,6 @@ public class ActivityAllAppsContainerView<T extends Context & ActivityContext>
         return mSearchUiManager;
     }
 
-    public View getBottomSheetBackground() {
-        return mBottomSheetBackground;
-    }
-
-    /**
-     * Temporarily force the bottom sheet to be visible on non-tablets.
-     *
-     * @param force {@code true} means bottom sheet will be visible on phones until {@code reset()}.
-     */
-    public void forceBottomSheetVisible(boolean force) {
-        mForceBottomSheetVisible = force;
-        updateBackgroundVisibility(mActivityContext.getDeviceProfile());
-    }
-
     public View getSearchView() {
         return mSearchContainer;
     }
@@ -496,7 +466,7 @@ public class ActivityAllAppsContainerView<T extends Context & ActivityContext>
         if (mHeader != null && mHeader.getVisibility() == VISIBLE) {
             mHeader.reset(animate);
         }
-        forceBottomSheetVisible(false);
+        updateBackgroundVisibility(mActivityContext.getDeviceProfile());
         // Reset the base recycler view after transitioning home.
         updateHeaderScroll(0);
         if (exitSearch) {
@@ -1002,18 +972,13 @@ public class ActivityAllAppsContainerView<T extends Context & ActivityContext>
     }
 
     protected void updateBackgroundVisibility(DeviceProfile deviceProfile) {
-        boolean visible = deviceProfile.isTablet || mForceBottomSheetVisible;
-        mBottomSheetBackground.setVisibility(visible ? View.VISIBLE : View.GONE);
-        // Note: For tablets, the opaque background and header protection are added in drawOnScrim.
+        mBottomSheetBackground.setVisibility(
+                deviceProfile.shouldShowAllAppsOnSheet() ? View.VISIBLE : View.GONE);
+        // Note: The opaque sheet background and header protection are added in drawOnScrim.
         // For the taskbar entrypoint, the scrim is drawn by its abstract slide in view container,
         // so its header protection is derived from this scrim instead.
     }
 
-    private void setBottomSheetAlpha(float alpha) {
-        // Bottom sheet alpha is always 1 for tablets.
-        mBottomSheetAlpha = mActivityContext.getDeviceProfile().isTablet ? 1f : alpha;
-    }
-
     @VisibleForTesting
     public void onAppsUpdated() {
         mHasWorkApps = Stream.of(mAllAppsStore.getApps())
@@ -1151,8 +1116,8 @@ public class ActivityAllAppsContainerView<T extends Context & ActivityContext>
         applyAdapterSideAndBottomPaddings(grid);
 
         MarginLayoutParams mlp = (MarginLayoutParams) getLayoutParams();
-        // Ignore left/right insets on tablet because we are already centered in-screen.
-        if (grid.isTablet) {
+        // Ignore left/right insets on bottom sheet because we are already centered in-screen.
+        if (grid.shouldShowAllAppsOnSheet()) {
             mlp.leftMargin = mlp.rightMargin = 0;
         } else {
             mlp.leftMargin = insets.left;
@@ -1398,7 +1363,7 @@ public class ActivityAllAppsContainerView<T extends Context & ActivityContext>
         // Draw full background panel for tablets.
         if (hasBottomSheet) {
             mHeaderPaint.setColor(mBottomSheetBackgroundColor);
-            mHeaderPaint.setAlpha((int) (255 * mBottomSheetAlpha));
+            mHeaderPaint.setAlpha(255);
 
             mTmpRectF.set(
                     leftWithScale,