Optimizing skipValue() to avoid allocation.
Optimizing skipValue() to avoid allocation.

I ran a quick benchmark on a desktop VM: this shortened the time
to parse a complete JSON document by ~25%.

Change-Id: Id479734654addfe86f4bf251f0dd6e78843023bf
http:79df7d81413591577807c8cd11d047aa9e42e969@google.com/twitter.JsonParseBenchmark/366001

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base