am fbb2a975: am c99557c9: am 0cb965a6: am 5020a873: Merge "cherrypick from jb-mr2-docs docs: Training class for game controllers. Change-Id: I697770aee8604c965c3730691459c1e8f10705da" into klp-docs

* commit 'fbb2a9753176af340d18fa6b72a1e0e46c7c3c6f':
  cherrypick from jb-mr2-docs docs: Training class for game controllers. Change-Id: I697770aee8604c965c3730691459c1e8f10705da