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/libs/input/android/InputApplicationInfo.aidl b/libs/input/android/InputApplicationInfo.aidl
index d1161e1..9336039 100644
--- a/libs/input/android/InputApplicationInfo.aidl
+++ b/libs/input/android/InputApplicationInfo.aidl
@@ -19,5 +19,5 @@
 parcelable InputApplicationInfo {
     @nullable IBinder token;
     @utf8InCpp String name;
-    long dispatchingTimeoutNanos;
+    long dispatchingTimeoutMillis;
 }