am 205d1c34: cherrypicking tools and adt r12 relnotes from hc-mr1 Change-Id: I0ea492417581c062f6433e23345fe3fe398709c0

* commit '205d1c34e3289b05700e6caab718de169ad82b90':
  cherrypicking tools and adt r12 relnotes from hc-mr1 Change-Id: I0ea492417581c062f6433e23345fe3fe398709c0