am c5e8b066: (-s ours) am a0a8117f: (-s ours) am b1da5d72: (-s ours) Updating SDK prebuilts to LKY51. DO NOT MERGE ANYWHERE

* commit 'c5e8b066abda68687a0df6564727f87d3e4344da':
  Updating SDK prebuilts to LKY51. DO NOT MERGE ANYWHERE