Add cutout examples. (android#111)

* Add cutout examples.

* Apply Spotless

---------

Co-authored-by: riggaroo <[email protected]>

compose/snippets/src/main/java/com/example/compose/snippets/system/CutoutSnippets.kt

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2023 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.
+ */
+
+package com.example.compose.snippets.system
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.Canvas
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.displayCutout
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.safeContent
+import androidx.compose.foundation.layout.windowInsetsPadding
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.drawscope.Stroke
+import androidx.compose.ui.unit.dp
+import androidx.core.view.WindowCompat
+
+/*
+* Copyright 2022 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
+*
+*     http://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.
+*/
+class CutoutExampleSnippet : ComponentActivity() {
+    // [START android_compose_cutouts_default]
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        WindowCompat.setDecorFitsSystemWindows(window, false)
+
+        setContent {
+            Box(Modifier.windowInsetsPadding(WindowInsets.safeContent)) {
+                // Any composable inside here will avoid drawing behind cutouts
+            }
+        }
+    }
+    // [END android_compose_cutouts_default]
+}
+
+@Composable
+fun CutoutManualHandling() {
+    // [START android_compose_cutouts_manual]
+    Canvas(modifier = Modifier.fillMaxSize().windowInsetsPadding(WindowInsets.displayCutout)) {
+        drawRect(Color.Red, style = Stroke(2.dp.toPx()))
+    }
+    // [END android_compose_cutouts_manual]
+}