Added stylus snippets.

compose/snippets/src/main/java/com/example/compose/snippets/stylus/StylusSnippets.kt

@@ -0,0 +1,53 @@
+/*
+ * Copyright 2025 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+@file:Suppress("unused")
+
+package com.example.compose.snippets.stylus
+
+import android.view.MotionEvent
+import androidx.compose.foundation.Canvas
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.ExperimentalComposeUiApi
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clipToBounds
+import androidx.compose.ui.input.pointer.pointerInteropFilter
+import androidx.lifecycle.ViewModel
+
+class UserViewModel : ViewModel() {
+    fun processMotionEvent(e: MotionEvent): Boolean {
+        return true
+    }
+}
+
+val viewModel = UserViewModel()
+
+// [START android_compose_stylus_motion_event_access]
+@Composable
+@OptIn(ExperimentalComposeUiApi::class)
+fun DrawArea(modifier: Modifier = Modifier) {
+    Canvas(
+        modifier = modifier
+            .clipToBounds()
+            .pointerInteropFilter {
+                viewModel.processMotionEvent(it)
+            }
+
+    ) {
+        // Drawing code here.
+    }
+}
+// [END android_compose_stylus_motion_event_access]