Merge tag 'android-6.0.0_r26' into HEAD

Android 6.0.0 release 26

* tag 'android-6.0.0_r26':
  Add SDK 23.
  SDK / support lib update to build #2239354. DO NOT MERGE ANYWHERE
  Update SDK and support lib to mnc-release - MRA37D #2147760

Change-Id: I161183e7dc686dc5cd84c6e478f1be2c1c989186