Seed aosp tf contrib project.

Add in example test/configs/preparer to set precedent as well as normal
project stuff (makefiles, readmes, etc) to get things building (and to
also make sure build files work).

BUG:36556899
Test: Built and started tf with seeded config and test.
Change-Id: Ia8eb408da272c424f626c8f77a91bb0eed6a656a
diff --git a/README.txt b/README.txt
new file mode 100644
index 0000000..b92469d
--- /dev/null
+++ b/README.txt
@@ -0,0 +1,5 @@
+This is the home for non-core src that belongs in the aosp extensions to Trade Federation.
+
+Non-core is defined as code that makes use of the Trade Federation framework
+like tests, configs, preparers and etc.  They are non-critical to the
+functionality of the framework itself.