Add release notes for Fitness 0.0.3

@collinjackson
diff --git a/examples/fitness/apk/release_notes/0.0.3.txt b/examples/fitness/apk/release_notes/0.0.3.txt
new file mode 100644
index 0000000..5934f86
--- /dev/null
+++ b/examples/fitness/apk/release_notes/0.0.3.txt
@@ -0,0 +1 @@
+Adds very basic charting support