Add section on input devices.
Change-Id: Ib9c4909881df505b11537c28bd08182933a5565a
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+<!--
+ Copyright 2011 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.
+-->
+
+# Input Technical Information #
+
+The Android input subsystem supports many different device classes,
+including keyboard, joystick, trackball, mouse and touch screen.
+
+The documentation in this section describes how to configure,
+calibrate, test, and write drivers for input devices.
+