Android 8.0.0 release 28
Merge cherrypicks of [2688425, 2689040, 2689041, 2689042, 2688662, 2688663, 2688664, 2688426, 2688427, 2688428, 2688665, 2688666, 2688667, 2688668, 2688669, 2688670, 2688671, 2688429, 2688672, 2689043, 2688673, 2688674, 2688675, 2688676, 2688677, 2688678, 2688679, 2688430, 2688431] into oc-release

Change-Id: I11258b08fedeb56c12f42eccd0d49fa2c7fd3722
tree: 127e08d12197dede8caed46163e90766ee73c068
  1. msm8974/
  2. msm8996/
  3. msm8998/
  4. Android.mk
  5. CleanSpec.mk