Merge tag 'android-6.0.0_r26' into HEAD

Android 6.0.0 release 26

* tag 'android-6.0.0_r26': (22 commits)
  Import translations. DO NOT MERGE
  Import translations. DO NOT MERGE
  Import translations. DO NOT MERGE
  Import translations. DO NOT MERGE
  save "retain loader" state
  Import translations. DO NOT MERGE
  Import translations. DO NOT MERGE
  Cherrypick from mnc-docs docs: Fixed bad links in LinearLayoutManager Original Change-Id: Ie4bef05857a2a29fd4f5409b33eff04c2a7eaf84
  Update revision to 19.
  Fix NPE in onTouchEvent again
  Fix support Fragment attribute reading
  Update public.xml files for AppCompat + Design
  Make sure we post setLayerType() calls from AnimationListeners
  Introduce ParallelExecutorCompat into support/v4
  Lower minSDK version for customtabs
  Update support library version to 23.0.1 DO NOT MERGE
  Fix material preference layouts and add a theme
  Get support lib ready for release
  Import translations. DO NOT MERGE
  Import translations. DO NOT MERGE
  ...

Change-Id: I47ab6de4ebc2c645a08e228a865be4466371f8fa