Added custom number picker for api < 11 compatibility

Extracted number picker (non public) from older android source and
included it into this project to remain compatible with devices api
level < 11. Devices api level > 11 will use native number pickers as the
are public facing in the sdk

Change-Id: I7cf7cba066b25516e90bd9951f4de7964b7fd613
Signed-off-by: Ricky Barrette <rickbarrette@gmail.com>

project.properties

@@ -0,0 +1,13 @@
+# This file is automatically generated by Android Tools.
+# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
+#
+# This file must be checked in Version Control Systems.
+#
+# To customize properties used by the Ant build system use,
+# "ant.properties", and override values to adapt the script to your
+# project structure.
+
+# Indicates whether an apk should be generated for each density.
+split.density=false
+# Project target.
+target=android-15