Chaniging all-apps scrim

> Converting the scrim to View, to better avoid overdraw
> Overview and Spring loaded state have different scrim alpha
> When going from overview to all-apps, there is a color scrim drawn over the overview panel.
  The slef color is merged with this color to prevent overdraw, and the remaining screen is drawn
  with a cut-out round rect path

Bug: 79111591
Change-Id: I26801fde13dd6adb4b06110bbe8087e35cc31847

src/com/android/launcher3/states/SpringLoadedState.java

@@ -33,7 +33,7 @@ import com.android.launcher3.userevent.nano.LauncherLogProto.ContainerType;
  */
 public class SpringLoadedState extends LauncherState {
 
-    private static final int STATE_FLAGS = FLAG_SHOW_SCRIM | FLAG_MULTI_PAGE |
+    private static final int STATE_FLAGS = FLAG_MULTI_PAGE |
             FLAG_DISABLE_ACCESSIBILITY | FLAG_DISABLE_RESTORE | FLAG_WORKSPACE_ICONS_CAN_BE_DRAGGED |
             FLAG_DISABLE_PAGE_CLIPPING | FLAG_PAGE_BACKGROUNDS | FLAG_HIDE_BACK_BUTTON;
 
@@ -85,6 +85,11 @@ public class SpringLoadedState extends LauncherState {
         launcher.getRotationHelper().setCurrentStateRequest(REQUEST_LOCK);
     }
 
+    @Override
+    public float getWorkspaceScrimAlpha(Launcher launcher) {
+        return 0.3f;
+    }
+
     @Override
     public void onStateDisabled(final Launcher launcher) {
         launcher.getWorkspace().getPageIndicator().setShouldAutoHide(true);