Add IInputConstants dependency for Input.h

In this VTS test, we are #including InputDevice.h, which in turn
depends on Input.h.

Since we are adding a depending on IInputConstants inside Input.h,
update the makefiles here to pass the build.

Bug: 175069843
Test: m VtsHalInputClassifierV1_0TargetTest
Change-Id: I6acded6137362fb9554e7c0c74abb1e6370acff6

input/classifier/1.0/vts/functional/Android.bp

@@ -26,7 +26,10 @@ package {
 cc_test {
     name: "VtsHalInputClassifierV1_0TargetTest",
     defaults: ["VtsHalTargetTestDefaults"],
-    srcs: ["VtsHalInputClassifierV1_0TargetTest.cpp"],
+    srcs: [
+        ":inputconstants_aidl",
+        "VtsHalInputClassifierV1_0TargetTest.cpp",
+    ],
     header_libs: ["jni_headers"],
     static_libs: [
         "android.hardware.input.classifier@1.0",