Merge Android R

Bug: 168057903
Merged-In: I798a1915e669f8ef63b1cd29d4aa408f9ae5bac3
Change-Id: Icaf87efda9f9e49d770619b663aa8c437cc73412
tree: 14c52d280ad337a3554e6fa0de4ae6327c59dd11
  1. proto/
  2. res/
  3. src/
  4. Android.bp
  5. AndroidManifest.xml
  6. OWNERS