DO NOT MERGE: drm_hwcomposer: Use a vector for composition source_layers
am: 9b70717071

* commit '9b70717071da6b5c098d2363a350d1f0f2333423':
  DO NOT MERGE: drm_hwcomposer: Use a vector for composition source_layers

Change-Id: Idf79f87ca6b866c115a7f32c096f5d8946decde1