docs: add Google IO 2011 logo

Change-Id: I0393325205c31f588d1e1fb64dfcc2d4714bdad6
diff --git a/tools/droiddoc/templates-sdk/assets/images/home/IO-logo-2011.png b/tools/droiddoc/templates-sdk/assets/images/home/IO-logo-2011.png
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+++ b/tools/droiddoc/templates-sdk/assets/images/home/IO-logo-2011.png
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