AOD: Use DOZE_SUSPEND screenstate when supported

Bug: 30876804
Bug: 33175018
Test: runtest -x packages/SystemUI/tests/src/com/android/systemui/doze/DozeSuspendScreenStatePreventingAdapterTest.java
Change-Id: If4d0cadced1f0ac3e737d78759820858b70081e6
diff --git a/packages/SystemUI/src/com/android/systemui/doze/DozeSuspendScreenStatePreventingAdapter.java b/packages/SystemUI/src/com/android/systemui/doze/DozeSuspendScreenStatePreventingAdapter.java
new file mode 100644
index 0000000..1e06797
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/doze/DozeSuspendScreenStatePreventingAdapter.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+
+package com.android.systemui.doze;
+
+import android.support.annotation.VisibleForTesting;
+import android.view.Display;
+
+import com.android.systemui.statusbar.phone.DozeParameters;
+
+/**
+ * Prevents usage of doze screen states on devices that don't support them.
+ */
+public class DozeSuspendScreenStatePreventingAdapter implements DozeMachine.Service {
+
+    private final DozeMachine.Service mInner;
+
+    @VisibleForTesting
+    DozeSuspendScreenStatePreventingAdapter(DozeMachine.Service inner) {
+        mInner = inner;
+    }
+
+    @Override
+    public void finish() {
+        mInner.finish();
+    }
+
+    @Override
+    public void setDozeScreenState(int state) {
+        if (state == Display.STATE_DOZE_SUSPEND) {
+            state = Display.STATE_DOZE;
+        }
+        mInner.setDozeScreenState(state);
+    }
+
+    @Override
+    public void requestWakeUp() {
+        mInner.requestWakeUp();
+    }
+
+    /**
+     * If the device supports the doze display state, return {@code inner}. Otherwise
+     * return a new instance of {@link DozeSuspendScreenStatePreventingAdapter} wrapping {@code inner}.
+     */
+    public static DozeMachine.Service wrapIfNeeded(DozeMachine.Service inner,
+            DozeParameters params) {
+        return isNeeded(params) ? new DozeSuspendScreenStatePreventingAdapter(inner) : inner;
+    }
+
+    private static boolean isNeeded(DozeParameters params) {
+        return !params.getDozeSuspendDisplayStateSupported();
+    }
+}