Merge changes from topic "easel-postview" into oc-mr1-dev

* changes:
  QCamera3: Add a vendor tag for continuous capture
  QCamera3: Add vendor keys for postview
tree: f90dab1861e3387db79d5e0a9d306e8a5cd9efa8
  1. msm8998/
  2. Android.mk
  3. CleanSpec.mk