binder: adjust GC interval for binder ops

The current value is too conservative, and causes
janks in certain use cases due to frequent explict GC.

Change-Id: Iba8eecd4e8ed7dce879c144fdc4407c12f76a749
diff --git a/core/jni/android_util_Binder.cpp b/core/jni/android_util_Binder.cpp
index c139cd7..9718fd7 100644
--- a/core/jni/android_util_Binder.cpp
+++ b/core/jni/android_util_Binder.cpp
@@ -144,7 +144,7 @@
 static void incRefsCreated(JNIEnv* env)
 {
     int old = android_atomic_inc(&gNumRefsCreated);
-    if (old == 200) {
+    if (old == 2000) {
         android_atomic_and(0, &gNumRefsCreated);
         env->CallStaticVoidMethod(gBinderInternalOffsets.mClass,
                 gBinderInternalOffsets.mForceGc);