DO NOT MERGE: Merge Oreo MR1 into master
am: 566a38bfcf  -s ours

Change-Id: I18b9b1130c16dd5bac6e8af9ba3c7b7f19edc271
tree: 52aa623a2a763cc496dd0d077f5c3078008bcb96
  1. prebuilt/
  2. Android.mk
  3. CleanSpec.mk
  4. README