Create inputreader directory

In order to start the work to split InputReader.cpp into multiple files,
we first create a reader directory to hold the source files for
libinputreader.

The affected files are also reformatted with clang-format.

Bug: 140139676
Test: libinputflinger and libinputflinger_tests builds successfully for
  crosshatch

Change-Id: I62b6b873e2a03e61655eb6214183c984306dcfdb
diff --git a/services/inputflinger/tests/InputReader_test.cpp b/services/inputflinger/tests/InputReader_test.cpp
index 09df2a7..55c0497 100644
--- a/services/inputflinger/tests/InputReader_test.cpp
+++ b/services/inputflinger/tests/InputReader_test.cpp
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#include "../InputReader.h"
+#include "InputReader.h"
 #include "TestInputListener.h"
 
 #include <gtest/gtest.h>