Convert bindings targets in mojo/mojo_services.gypi to GN.

mojo/services/public/interfaces/input_events/BUILD.gn

Index: mojo/services/public/interfaces/input_events/BUILD.gn
diff --git a/mojo/public/interfaces/service_provider/BUILD.gn b/mojo/services/public/interfaces/input_events/BUILD.gn
similarity index 55%
copy from mojo/public/interfaces/service_provider/BUILD.gn
copy to mojo/services/public/interfaces/input_events/BUILD.gn
index 990d3e9b6264ceac8ce9bc5e69e02dcf3db0bfd5..a1e1158d99f83aa4ea06652fe53dffcae337ea85 100644
--- a/mojo/public/interfaces/service_provider/BUILD.gn
+++ b/mojo/services/public/interfaces/input_events/BUILD.gn
@@ -4,8 +4,13 @@
 
 import("//mojo/public/tools/bindings/mojom.gni")
 
-mojom("service_provider") {
+# GYP version: mojo/mojo_services.gypi:mojo_input_events_bindings
+mojom("bindings") {
   sources = [
-    "service_provider.mojom",
+    "input_events.mojom",
+  ]
+
+  deps = [
+    "//mojo/services/public/interfaces/geometry:bindings",
   ]
 }