Merge "Track libcore change 162bf4d3d62da1e581e7a40e01f5ad664f0507ef" am: aeec0e06 am: 72d823a3 am: 725be0c7 am: d30cfb69 Change-Id: I0a29673e7ac9a27b0135a5d46a24aaa2686b3ebc