SDK repo: use a template for samples/source.properties.

Use a template for samples/source.properties so that it automatically
picks up the current platform API level.

Also merges 52feec594a769653625f6089cfcd5398332922ea
("Update rev numbers of SDK packages.")

Change-Id: I89574842d2b0290cc6cf454f82a3721644cae0f0
5 files changed