Some launcher3 fixes so that it compiles with different configurations

Bug: 79996542
Change-Id: I4267aeb8f5b0714415970c63453049ff41466644

quickstep/src/com/android/quickstep/QuickstepProcessInitializer.java

@@ -20,6 +20,7 @@ import android.content.Context;
 import com.android.launcher3.MainProcessInitializer;
 import com.android.systemui.shared.system.ThreadedRendererCompat;
 
+@SuppressWarnings("unused")
 public class QuickstepProcessInitializer extends MainProcessInitializer {
 
     public QuickstepProcessInitializer(Context context) { }