Send trim memory to trim icon cache when stopped

- Workaround for b/78520668

Bug: 76162466

Change-Id: I2c225c59484984a671186415cb1eb19161f57ba6

quickstep/src/com/android/quickstep/RecentsActivity.java

@@ -225,6 +225,14 @@ public class RecentsActivity extends BaseDraggingActivity {
         mFallbackRecentsView.resetTaskVisuals();
     }
 
+    @Override
+    protected void onStop() {
+        super.onStop();
+
+        // Workaround for b/78520668, explicitly trim memory once UI is hidden
+        UiFactory.onTrimMemory(this, TRIM_MEMORY_UI_HIDDEN);
+    }
+
     @Override
     public void onTrimMemory(int level) {
         super.onTrimMemory(level);

src/com/android/launcher3/Launcher.java

@@ -737,6 +737,8 @@ public class Launcher extends BaseDraggingActivity
         NotificationListener.removeNotificationsChangedListener();
         getStateManager().moveToRestState();
 
+        // Workaround for b/78520668, explicitly trim memory once UI is hidden
+        UiFactory.onTrimMemory(this, TRIM_MEMORY_UI_HIDDEN);
     }
 
     @Override