Remove views from StatusBarView when View is detached.

Dreams were crashing SysUI. The MediaShellView was still attached after
a dream starts so the next time Dreams came up, it would still have a
parent causing SysUI to crash

Bug: 242626584
Test: atest DreamOverlayStatusBarViewControllerTest
Change-Id: Ibf14a10139e0c4d58c95be49e00992da138d1fc7

packages/SystemUI/src/com/android/systemui/dreams/DreamOverlayStatusBarView.java

@@ -113,7 +113,7 @@ public class DreamOverlayStatusBarView extends ConstraintLayout {
     }
 
     void setExtraStatusBarItemViews(List<View> views) {
-        mSystemStatusViewGroup.removeAllViews();
+        removeAllStatusBarItemViews();
         views.forEach(view -> mSystemStatusViewGroup.addView(view));
     }
 
@@ -121,4 +121,8 @@ public class DreamOverlayStatusBarView extends ConstraintLayout {
         final View statusIcon = findViewById(resId);
         return Objects.requireNonNull(statusIcon);
     }
+
+    void removeAllStatusBarItemViews() {
+        mSystemStatusViewGroup.removeAllViews();
+    }
 }

packages/SystemUI/src/com/android/systemui/dreams/DreamOverlayStatusBarViewController.java

@@ -192,6 +192,7 @@ public class DreamOverlayStatusBarViewController extends ViewController<DreamOve
         mDreamOverlayNotificationCountProvider.ifPresent(
                 provider -> provider.removeCallback(mNotificationCountCallback));
         mStatusBarItemsProvider.removeCallback(mStatusBarItemsProviderCallback);
+        mView.removeAllStatusBarItemViews();
         mTouchInsetSession.clear();
 
         mIsAttached = false;

packages/SystemUI/tests/src/com/android/systemui/dreams/DreamOverlayStatusBarViewControllerTest.java

@@ -307,6 +307,12 @@ public class DreamOverlayStatusBarViewControllerTest extends SysuiTestCase {
         verify(mDreamOverlayStatusBarItemsProvider).removeCallback(any());
     }
 
+    @Test
+    public void testOnViewDetachedRemovesViews() {
+        mController.onViewDetached();
+        verify(mView).removeAllStatusBarItemViews();
+    }
+
     @Test
     public void testWifiIconHiddenWhenWifiBecomesAvailable() {
         // Make sure wifi starts out unavailable when onViewAttached is called, and then returns