Fix a bad cherry-pick

Move Volley.java into the correct source path (recovering from a bad
cherry-pick).

Change-Id: Ia085bd8de8c6965ec41fd8c03c217d4c56a07e11
diff --git a/volley/src/com/android/volley/toolbox/Volley.java b/src/com/android/volley/toolbox/Volley.java
similarity index 100%
rename from volley/src/com/android/volley/toolbox/Volley.java
rename to src/com/android/volley/toolbox/Volley.java