Use sysprop APIs for InputFlinger: per_window_input_rotation

Add a sysprop file for InputFlinger, and add a sysprop entry for the
per_window_input_rotation flag.

Bug: 179274888
Test: build
Change-Id: Id11f72f7774e2b04a9817ac5807808ccbd33fb28
diff --git a/services/inputflinger/sysprop/InputFlingerProperties.sysprop b/services/inputflinger/sysprop/InputFlingerProperties.sysprop
new file mode 100644
index 0000000..1c7e724
--- /dev/null
+++ b/services/inputflinger/sysprop/InputFlingerProperties.sysprop
@@ -0,0 +1,27 @@
+# Copyright (C) 2021 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.
+
+module: "android.sysprop.InputFlingerProperties"
+owner: Platform
+
+# When per-window-input-rotation is enabled, InputReader works in the un-rotated
+# display coordinate space, and the display rotation is encoded as part of the
+# input window transform that is sent from SurfaceFlinger to InputDispatcher.
+prop {
+    api_name: "per_window_input_rotation"
+    type: Boolean
+    scope: Internal
+    access: ReadWrite
+    prop_name: "persist.debug.per_window_input_rotation"
+}