Add explicit README for configstore future goals. am: 31f5143c23
am: 3542341bbb

Change-Id: Icc3df703fc7ca9c79551ed7fc9ea47e40d3f0991
diff --git a/configstore/README.md b/configstore/README.md
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+Configstore is specifically the configuration for surface flinger. Other configurations go in other packages.