Merge tag 'android-6.0.0_r26' into HEAD

Android 6.0.0 release 26

* tag 'android-6.0.0_r26':

Change-Id: I57efb311239208437d9a4df67c10547708b1f100
tree: 84f7f840df7f869f1882795b2b67fa30d78f6a34
  1. library/
  2. navigationbar/
  3. tools/
  4. .gitignore