manifest: android-8.1.0_r1 -> android-8.1.0_r4

Change-Id: I1b2f8331f1e3ca725495a2f3290e58d14b2ca69e
1 file changed
tree: a51e7dbb70a19d4c9b5793a409acbe1a29638bab
  1. snippets/
  2. default.xml
  3. README.mkdn