Remove more requires 24 anotations (#180116)

similar to #180051
<img width="471" height="234" alt="save_0"
src="https://github.com/user-attachments/assets/f3ef3e61-861e-456e-a7ec-f2315db742bc"
/>


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we expect every widget to implement].
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- [ ] I listed at least one issue that this PR fixes in the description
above.
- [ ] I updated/added relevant documentation (doc comments with `///`).
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[test-exempt].
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Fixes] where supported.
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engine/src/flutter/shell/platform/android/io/flutter/embedding/android/FlutterActivity.java

@@ -629,7 +629,6 @@ public class FlutterActivity extends Activity
   }
 
   @Override
-  @RequiresApi(API_LEVELS.API_24)
   protected void onCreate(@Nullable Bundle savedInstanceState) {
     switchLaunchThemeForNormalTheme();
 
@@ -799,7 +798,6 @@ public class FlutterActivity extends Activity
   }
 
   @NonNull
-  @RequiresApi(API_LEVELS.API_24)
   private View createFlutterView() {
     return delegate.onCreateView(
         /* inflater=*/ null,
@@ -897,7 +895,6 @@ public class FlutterActivity extends Activity
   }
 
   @Override
-  @RequiresApi(API_LEVELS.API_24)
   public void detachFromFlutterEngine() {
     Log.w(
         TAG,
@@ -913,7 +910,6 @@ public class FlutterActivity extends Activity
   }
 
   @Override
-  @RequiresApi(API_LEVELS.API_24)
   protected void onDestroy() {
     super.onDestroy();
     if (stillAttachedForEvent("onDestroy")) {

engine/src/flutter/shell/platform/android/io/flutter/embedding/android/FlutterActivityAndFragmentDelegate.java

@@ -369,7 +369,6 @@ import java.util.List;
    * </ol>
    */
   @NonNull
-  @RequiresApi(API_LEVELS.API_24)
   View onCreateView(
       LayoutInflater inflater,
       @Nullable ViewGroup container,
@@ -668,7 +667,6 @@ import java.util.List;
    *
    * <p>This method removes this delegate's {@link FlutterView}'s {@link FlutterUiDisplayListener}.
    */
-  @RequiresApi(API_LEVELS.API_24)
   void onDestroyView() {
     Log.v(TAG, "onDestroyView()");
     ensureAlive();

engine/src/flutter/shell/platform/android/io/flutter/plugin/mouse/MouseCursorPlugin.java

@@ -4,16 +4,12 @@
 
 package io.flutter.plugin.mouse;
 
-import static io.flutter.Build.API_LEVELS;
-
 import android.view.PointerIcon;
 import androidx.annotation.NonNull;
-import androidx.annotation.RequiresApi;
 import io.flutter.embedding.engine.systemchannels.MouseCursorChannel;
 import java.util.HashMap;
 
 /** A mandatory plugin that handles mouse cursor requests. */
-@RequiresApi(API_LEVELS.API_24)
 public class MouseCursorPlugin {
   @NonNull private final MouseCursorViewDelegate mView;
   @NonNull private final MouseCursorChannel mouseCursorChannel;
@@ -115,7 +111,7 @@ public class MouseCursorPlugin {
     /**
      * Gets a system pointer icon object for the given {@code type}.
      *
-     * <p>If typeis not recognized, returns the default pointer icon.
+     * <p>If type is not recognized, returns the default pointer icon.
      *
      * <p>This is typically implemented by calling {@link android.view.PointerIcon#getSystemIcon}
      * with the context associated with this view.