Add default input dispatching timeout constant

To use the same number consistently in java and native, add
IInputConstants interface where we will store the constants.

Bug: 161009325
Test: atest inputflinger_tests
Change-Id: I10f45547b1161e3768a134b38bf40d77a3a82f09
diff --git a/services/inputflinger/tests/InputDispatcher_test.cpp b/services/inputflinger/tests/InputDispatcher_test.cpp
index cc19cb1..c7bb2ac 100644
--- a/services/inputflinger/tests/InputDispatcher_test.cpp
+++ b/services/inputflinger/tests/InputDispatcher_test.cpp
@@ -584,7 +584,8 @@
     FakeApplicationHandle() {
         mInfo.name = "Fake Application";
         mInfo.token = new BBinder();
-        mInfo.dispatchingTimeoutNanos = DISPATCHING_TIMEOUT.count();
+        mInfo.dispatchingTimeoutMillis =
+                std::chrono::duration_cast<std::chrono::milliseconds>(DISPATCHING_TIMEOUT).count();
     }
     virtual ~FakeApplicationHandle() {}
 
@@ -592,8 +593,8 @@
         return true;
     }
 
-    void setDispatchingTimeout(std::chrono::nanoseconds timeout) {
-        mInfo.dispatchingTimeoutNanos = timeout.count();
+    void setDispatchingTimeout(std::chrono::milliseconds timeout) {
+        mInfo.dispatchingTimeoutMillis = timeout.count();
     }
 };