Refactored HandleDrivetrain from joystick_reader to aos_input.

Change-Id: I4ed796cf90e698ed2198f0da4a2b75e88e28c434
diff --git a/aos/input/BUILD b/aos/input/BUILD
index 30cb053..d8fc2c8 100644
--- a/aos/input/BUILD
+++ b/aos/input/BUILD
@@ -16,3 +16,22 @@
     '//aos/common/logging:queue_logging',
   ],
 )
+
+cc_library(
+  name = 'drivetrain_input',
+  srcs = [
+    'drivetrain_input.cc'
+  ],
+  hdrs = [
+    'drivetrain_input.h',
+  ],
+  deps = [
+    '//aos/common/input:driver_station_data',
+    '//aos/common/logging',
+    '//aos/common/logging:queue_logging',
+    '//aos/common/messages:robot_state',
+    '//aos/common/network:socket',
+    '//aos/common:math',
+    '//frc971/control_loops/drivetrain:drivetrain_queue',
+  ],
+)